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April 20, 2014

Search: The vapor pressure of pure water at 20 degrees celsius is 17.5 torr. What is the vapor pressure at 20 degrees celsius above a solution that has 85.5 g of sucrose and 75 g of urea dissolved per kg of water?

Number of results: 12,194

Physical chemistry
Estimate the vapor pressure of sea water at 20C given that the vapor pressure of pure water is 2.338 kPa at that temperature and the solute is largely Na+ and Cl- ions, each present in about .50 mol/dm^3. I'm pretty sure the formula to use is pj=xjpj'. Where pj' is the vapor ...
Thursday, September 30, 2010 at 8:27pm by Melissa

Dr. Bobb222
When you get a chance: If the pure liquid vapor pressure of benzene is 155 torr and the pure liquid vapor pressure of chloroform is 333 torr, then what is the total vapor pressure at 30C of a solution of 9.26 g of benzene (C6H6) and 4.26 g of chloroform (CHCl3)? I get 195torr.
Monday, August 5, 2013 at 4:36am by Devron

chemistry
What is the vapor pressure at 23 C of a solution of 1.20 g of naphthalene, C10H8, in 25.6 g of benzene, C6H6? The vapor pressure of pure benzene at 23 C is 86.0 mmHg; the vapor pressure of naphthalene can be neglected. Calculate the vapor pressure lowering of the solution.
Monday, April 15, 2013 at 11:33am by george

Chemistry
The vapor pressure of pure ethanol at 20 degrees C is 44 mmHg, and the vapor pressure of pure methanol at the same temperature is 94 mmHg. In a solution of the two, the mole fraction of ethanol is .439; the mole fraction for methanol is .561. Calculate the vapor pressure of ...
Monday, October 18, 2010 at 5:38pm by Stephany

Chem II
What is the vapor pressure at 23 degrees C of a solution of 1.20 g of naphthalene, C10H8, in 25.6 g of benzene, C6H6? The vapor pressure of pure benzene at 23 degrees C is 86.0 mmHg; the vapor pressure of naphthalene can be neglected. Calcluate the vapor pressure lowering of ...
Thursday, February 14, 2008 at 2:30pm by Ken

chemistry
The answer most likely is c. The vapor in equilibrium with the solution is the sum of the vapor pressure of each liquid. Each liquid has a vapor pressure that depends upon two things; the mole fraction and the vapor pressure of the pure solvent. Psolvent = Xsolvent*Popure ...
Saturday, February 20, 2010 at 6:57pm by DrBob222

Chemistry
1) What is the vapor pressure at 25C of a solution of 1.20g ofnephtalene C10H8 in 25.6g of benzone C6H6? The vapor pressure of pure benzene at 23C is 86.0mmHg the vapor pressure of naphthalene can be neglected. Calculate the vapor pressure lowering of the solution. 2)A ...
Tuesday, March 19, 2013 at 11:30pm by N comas

CHEMISTRY
1. What is the vapor pressure at 25C of a solution of 1.20g of nephtalene C10H8 in 25.6g of benzone C6H6? The vapor pressure of pure benzene at 23C is 86.0mmHg the vapor pressure of naphthalene can be neglected. Calculate the vapor pressure lowering of the solution. 2. A ...
Wednesday, March 20, 2013 at 12:14am by N COMAS

Chemistry 2
An aqueous solution has a vapor pressure of 81.1 at 50 . The vapor pressure of pure water at this temperature is 92.6. What is the concentration of in mass percent?
Thursday, January 27, 2011 at 9:42pm by Jesse

Chemistry
Need help with this question. Any help is appreciated. Heptane, C7H16, and octane, C8H18, form ideal solution. The solution boils at 85.00 C and 0.522 atm. (At 85.00 C, the vapor pressure of pure heptane is 0.570 atm and the vapor pressure of pure octane is 0.234 atm.) What ...
Saturday, March 30, 2013 at 4:25pm by GeeGee

chemistry - vapor pressure
the vapor pressure of pure water at 25C is 23.8 torr. determine the vapor pressure (torr) of water at 25 C above a solution prepared by dissolving 35g of urea (a nonvolatile, non-electrolyte, MW = 60.0G/MOL) IN 76G of water. answer:21 i just want to know the steps bc im ...
Monday, September 13, 2010 at 10:47pm by billy

vapor and osmotic pressure
A solution of the sugar mannitol ( molar mass 182.2 g/mol ) is prepared by adding 54.66 g of mannitol to 1.000 kg of water. The vapor pressure of pure liquid water is 17.54 torr at 20o C. Mannitol is nonvolatile and does not ionize in aqueous solution. a.) Assuming that ...
Thursday, October 12, 2006 at 3:03am by Amy

chemistry
At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene (vapor pressure of pure toluene = 290 torr). The mole fraction of benzene in the vapor above the solution is 0.590. Assuming ideal behavior, calculate the mole ...
Wednesday, February 22, 2012 at 4:48pm by renee

Chemistry
An aqueous CaCl_2 solution has a vapor pressure of 82.1mmHg at 50C. The vapor pressure of pure water at this temperature is 92.6mmHg. What is the concentration of CaCl_2 in mass percent?
Wednesday, January 20, 2010 at 7:46pm by melissa

Physical Chemistry
The measured osmotic pressure of seawater is 25 atm at 273K. a.) What is the activity of water in seawater at 273 K? Take the partial molar volume of water in seawater to be 0.018 M-1. b.) The vapor pressure of pure water at 273 K is 4.6 torr. What is the vapor pressure of ...
Thursday, October 12, 2006 at 3:04am by Jane

Chemistry
Which of the following statements is (are) true? A. The vapor pressure of CO2 is lower than the vapor pressure of water. B. Sea water has a lower vapor pressure than distilled water. C. The vapor pressure of 1 m NaCl is higher than the vapor pressure of 0.5 m KNO3, assuming ...
Monday, August 30, 2010 at 8:07pm by kendra

PLEASE HELP! PHYSICAL CHEM
The measured osmotic pressure of seawater is 25 atm at 273K. a.) What is the activity of water in seawater at 273 K? Take the partial molar volume of water in seawater to be 0.018 M-1. b.) The vapor pressure of pure water at 273 K is 4.6 torr. What is the vapor pressure of ...
Saturday, October 14, 2006 at 5:31am by Amy

Chemistry
A solution of NaCl in water has a vapor pressure of 18.1 torr at 25 degrees C. What is the mole fraction of NaCl solute particles in this solution? What is vapor pressure at 45 degrees C? Vapor pressure of pure water is 23.8 torr at 25C and 71.9 torr at 45C, assume ions are Na...
Sunday, March 7, 2010 at 9:22pm by Sara

Chemistry!!!~!!
A solution of sodium chloride in water has a vapor pressure of 18.5 torr at 25C. What is the mole fraction of NaCl in this solution? What would be the vapor pressure of this solution at 48C? The vapor pressure of pure water is 23.8 torr at 25C and 83.7 torr at 48C. I've ...
Monday, April 19, 2010 at 10:35am by Jenn

Chem again sorry
A solution of sodium chloride in water has a vapor pressure of 18.3 torr at 25C. What is the mole fraction of NaCl in this solution? __________ What would be the vapor pressure of this solution at 45C? The vapor pressure of pure water is 23.8 torr at 25C and 71.9 torr at 45...
Sunday, November 30, 2008 at 12:06am by Dina

CHEMISTRY
if a pure liquid in a sealed container is in equilibrium with its own vapor, the dependence of the vapor pressure on the temperature and the heat of vaporization is governed by the Clausius-Clapeyron equation. what is the heat of vaporization if the vapor pressure of liquid ...
Monday, December 10, 2012 at 1:00am by tre

Physical Chemistry HELP!!!!!
A solution of the sugar mannitol ( molar mass 182.2 g/mol ) is prepared by adding 54.66 g of mannitol to 1.000 kg of water. The vapor pressure of pure liquid water is 17.54 torr at 20o C. Mannitol is nonvolatile and does not ionize in aqueous solution. a.) Assuming that ...
Saturday, October 14, 2006 at 5:29am by Lan

chemistry
Pressure of pure A at 85 (degrees)C is 500 mmHg, what is the vapor pressure of pure B at this temperature? A)336 mmHg B)960 mmHg C)576 mmHg
Sunday, June 27, 2010 at 6:58pm by jimbo

chemistry
Glycerin (C3H8O3) is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 180. g of glycerin to 321 mL of H2O at 39.8C? The vapor pressure of pure water at 39.8C is 54.74 torr and its density is 0.992 g/cm3.
Tuesday, May 4, 2010 at 2:02pm by bob

chemistry
Glycerin, C3H8O3, is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 164 g of glycerin to 325 mL of H2O at 39.8C? The vapor pressure of pure water at 39.8C is 54.74 torr and its density is 0.992 g/cm3.
Saturday, February 12, 2011 at 4:36pm by tay

Chemistry
How would you prepare 500.0 of an aqueous solution of glycerol with a vapor pressure of 24.8mm Hg at 26 degree Celsius (vapor pressure of pure water=25.21mm Hg)? assume the density of the solution to be 1.00 g/mL.
Monday, September 10, 2012 at 1:29am by Kris

Chem
The boiling point is defined as the temperature at which the vapor pressure of the liquid equals the atmospheric pressure. So as the pressure is increased, the vapor pressure must be higher if pressure is higher and how do we get a higher vapor pressure. Lower T or higher T?
Wednesday, February 23, 2011 at 11:02pm by DrBob222

Chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 10.7 g of biphenyl in 33.9 g of benzene?
Saturday, February 18, 2012 at 10:53pm by Sarah

Chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 18.9 g of biphenyl in 26.4 g of benzene?
Wednesday, February 22, 2012 at 12:10am by Josh

Chem 2
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 12.5 g of biphenyl in 27.9 g of benzene?
Saturday, July 14, 2012 at 5:28pm by Payie

Science
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 15.2 g of biphenyl in 29.5 g of benzene?
Tuesday, October 9, 2012 at 12:52pm by Maria

chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 19.9 g of biphenyl in 34.3 g of benzene?
Monday, January 21, 2013 at 9:05pm by Brianna

chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 11.1 g of biphenyl in 29.1 g of benzene?
Friday, February 22, 2013 at 7:42pm by Anonymous

Chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 17.3 g of biphenyl in 34.0 g of benzene?
Monday, February 25, 2013 at 4:52am by Max

Mole fraction of a vapor pressure?
If 0.380 mol of a nonvolatile nonelectrolyte are dissolved in 3.00 mol of water, what is the vapor pressure P(H2O) of the resulting solution? The vapor pressure of pure water is 23.8 torr at 25 C. I got this answer correct: 21.1 torr A solution is composed of 1.50mol ...
Thursday, September 2, 2010 at 3:31pm by Sar

chemistry
An ideal solution contains 40 mole % of A and 60 mole % of B at 80 degrees C. The vapor pressure of pure A and B at this temp are 480 torr and 890 torr. Calculate the vapor pressure of the solution.
Thursday, October 7, 2010 at 7:07pm by Anonymous

chemistry
The vapor pressure of pure water at 25 degrees Celsius is 23.77 mm Hg. What is the vapor pressure, in mm Hg, of water above a solution that is 1.5m glucose, C6H12O6?
Sunday, December 11, 2011 at 4:50pm by Anonymous

chemistry
How many grams of NaCl must be added to 225.0 g of H2O at 45 C to lower the vapor pressure of water by 2.21 mmHg? The vapor pressure of pure water is 71.93 mmHg at 45 C.
Saturday, April 20, 2013 at 1:21am by Kelly

Pacific Union College
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 17.5 g of biphenyl in 28.8 g of benzene?
Sunday, February 24, 2013 at 11:26am by Nick

Chemistry
Calculate the vapor pressure of a solution of 0.48 mol of cholesterol in 6.0 mol of toluene at 32C. Pure toluene has a vapor pressure of 41 torr at 32C. (Assume ideal behavior.)
Saturday, February 16, 2013 at 4:54pm by Stevi

Chemistry
2. A 3.37 gram sample of a nonvolatile nonelectrolyte ( no ions) is dissolved in 23.7 grams of hexane (C6H14) at 25.0 degrees calcius. The vapor pressure of pure hexane at this temperature is 438 tort, and the vapor pressure of the solution is 419.3 torr. Calculate the ...
Monday, December 17, 2012 at 9:50am by Nad

Chemistry: Raoult's Law
If 0.380 mol of a nonvolatile nonelectrolyte are dissolved in 3.00 mol of water, what is the vapor pressure P(H2O) of the resulting solution? The vapor pressure of pure water is 23.8 torr at 25 C. I got this answer correct: 21.1 torr A solution is composed of 1.50mol ...
Thursday, September 2, 2010 at 2:18pm by Sar

College Chemistry
Calculate the vapor pressure of a solution of 0.39 mol of cholesterol in 5.4 mol of toluene at 32oC. Pure toluene has a vapor pressure of 41 torr at 32oC.
Friday, November 19, 2010 at 9:18am by Molly

vapor pressure
Vapor pressure is the pressure exerted by a vapor when condensation (<,>, or =) evaporation over its liquid in a closed system = =
Wednesday, January 17, 2007 at 8:43pm by yayhawknelson

chem
The solvent for an organic reaction is prepared by mixing 50.0 of acetone () with 57.0 of ethyl acetate (). This mixture is stored at 25.0 . The vapor pressure and the densities for the two pure components at 25.0 are given in the following table. What is the vapor pressure of...
Saturday, February 5, 2011 at 7:18pm by Anonymous

Chemistry
At a certain temperature the vapor pressure of pure benzene is measured to be 322. torr . Suppose a solution is prepared by mixing 138.g of benzene and 91.2g of heptane . Calculate the partial pressure of benzene vapor above this solution. 3 sig figs! Steps/equations are ...
Wednesday, April 11, 2012 at 4:05am by Elizabeth L.

Chem6
A solution contains naphthalene dissolved in hexane at a concentration of 10.40% naphthalene by mass. Calculate the vapor pressure of hexane above the solution, given that the vapor pressure of pure hexane at this temperature is 151 torr.
Monday, May 2, 2011 at 11:40pm by Ryan

Chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 19.6 g of biphenyl in 25.1 g of benzene?
Tuesday, January 29, 2013 at 9:23pm by Gabrielle

Chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure (in torr) of a solution made from dissolving 16.6 g of biphenyl in 26.0 g of benzene?
Wednesday, January 23, 2013 at 2:31am by Ocean

Chemistry
Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?
Saturday, February 9, 2013 at 3:32pm by Felicia

college chem
Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?
Saturday, February 9, 2013 at 5:42pm by Zachary

Chemistry
The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of acetone in the solution? Show work. A) 0.69 B) 0.32 C) 0.13 D) 0.045 E) 0.87
Wednesday, February 27, 2013 at 2:36pm by Dee

chem
You find the line that divides liquid/gas. At T = 179 you should find the vapor pressure (on the pressure axis) = 1 atm or 760 mm Hg. So read the vapor pressure from that vapor/liquid line at 125. That should be the vapor pressure at that temperature.
Friday, February 12, 2010 at 7:36pm by DrBob222

Chemistry
What is the vapor pressure in Torr above a solution prepared by mixing 66.73g of benzene C6H6 with 63.26g toluene C6H5CH3 at 20 Celsius. The vapor pressure of pure benzene and toluene at 20celsius are 75 and 22 torr respectively. These compounds form nearly ideal solutions ...
Saturday, April 23, 2011 at 5:07pm by Jude

chemistry
Compute the vapor pressure of water above a solution formed by dissolving 25.00 grams of magnesium sulfate, MgSO4 (MM=120.3) in 95.00 grams of water at 338K. The vapor pressure of pure water at 338K is 188.0 torr.
Monday, February 23, 2009 at 7:27pm by Aimee

College chemistry
-22C is well below the boiling point. Only a small amount will be present as vapor. You can estimate that amount using the Clausius-Clapeyron equation and the 1 atm vapor pressure at -0.4 C. You can also use the C-C equation for the vapor pressure at the higher temperature, 25...
Saturday, January 23, 2010 at 12:31pm by drwls

Chemistry
What is the vapor pressure of a solution composed of 3.0 moles benzene (vapor pressure 12.1 kPa) & 1 mole chloroform (vapor pressure 25.2 kPa)
Tuesday, January 15, 2008 at 9:35pm by Anonymous

chem lab (webwork)
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. independent of the chemical identity of the solute. C. responsible for lowering the vapor pressure of a solution versus the vapor pressure...
Monday, April 5, 2010 at 1:04am by UCI studebt

College Chemistry
The boiling point of a liquid at atmospheric pressure is the temperature: a. at which bubbles of vapor expand within the liqud b. at which the liquid solidifies c. at which the vapor pressure first exceeds the critical temperature d. at which the vapor pressure is equal to the...
Sunday, March 28, 2010 at 3:50pm by Donna

chemistry ap
Why would [23.8-(.0588)(23.8)] be the proper setup to determine the vapor pressure of a solution at 25 Celsius that has 45g of C6H12O6, glucose (MM=180gxmol^-1), dissolved in 72g of H2O? The vapor pressure of pure water at 25Celsius is 23.8 torr. vp pure solvent - lowering due...
Thursday, May 17, 2007 at 5:19pm by alexa

About Chemistry
The vapor pressure of pure water at 25 C is 23.8 torr. Determine the vapor pressure (torr) of water at 25 C above a solution prepared by dissolving 35 g of urea (a nonvolatile, non-electrolyte, MW = 60.0 g/mol) in 75 g of water. im not sure about the steps for problems like ...
Wednesday, September 15, 2010 at 10:36pm by BEN

Chemistry
Because the vapor pressure of C2H5OH is 760 mm at 78 degrees C. And because the vapor pressure of H2O is 760 mm at 100 degrees C. The definition of boiling point is that temperature at which the vapor pressure of the liquid equals atmospheric pressure.
Tuesday, January 29, 2008 at 9:17pm by DrBob222

chemistry
calculate the vapor pressureof a solution of 20.0g sucrose (C12H12O6) in 80.0g water at 25 degrees celsius (vapor pressure, P, of pure water at 25C is 24torr)
Thursday, September 27, 2012 at 6:58pm by honeeey

Chemistry
A 5.00-gram sample of glucose, C6H12O6, [molar mass = 180.] is dissolved 10.0 grams of water What is the molality of the glucose solution? Calculate the boiling(BP) and freezing points(FP) of this solution to the nearest 0.1 C. The vapor pressure of pure water at 30C is 25.0...
Saturday, January 15, 2011 at 10:26pm by Mark

chemistry
A solution contains naphthalene(C10H8) dissolved in hexane (C6H14) at a concentration of 14.52 % naphthalene by mass.Calculate the vapor pressure at 25 degrees C of hexane above the solution. The vapor pressure of pure hexane at 25 degrees C is 151 .
Thursday, August 5, 2010 at 3:25pm by jay

Chemistry
What is the vapor pressure at 23 degree C of a solution of 1.20g of naphthalene, C10H8 in 25.6 g of benzene, C6H6? The vapor pressure of naphthalene can be neglected. Calculate the vapor-pressure lowering the solution
Thursday, February 7, 2008 at 9:24pm by Lauren

Chemistry
you need to find the pressure for water vapor for certain temperatures. this is given in a table and have been calculated for you. use the dalton's law of Partial pressure. i.e. the Pressure for the dry gas equals the Total pressure of the system - the pressure of water vapor ...
Saturday, May 11, 2013 at 3:27pm by bonjo

chem
If the total pressure is 752 mm Hg, that is the pressure of the H2 gas + the pressure of the water. So look up the vapor pressure of water at 25 degrees C (at moderate temperatures I remember that the vapor pressure of water is approximately the samae as the T reading in C---...
Sunday, May 11, 2008 at 8:15pm by DrBob222

chemistry
I am not certain if I understand the question. vapor pressure indicates the tendency for molecules to move to the vapor state. If forces bind the molecules together, bp will be highter, and for a given temperature, vapor pressure is lower. If forces disperse molecules, bp is ...
Monday, May 20, 2013 at 9:53pm by bobpursley

Chemistry
The osmotic pressure of the sugar solution is higher (the vapor pressure is lower) and water molecules from the beaker of pure water will evaporate and condense in the beaker with the sugar solution. It does this in an effort to, in effect, dilute the sugar solution to pure ...
Thursday, January 17, 2008 at 9:52am by DrBob222

chemistry
What is the vapor pressure (in mm Hg) of a solution of 12.5 g of glucose ( C6H12O6) in 75.0 g of methanol (CH3OH) at 27 degrees celcius? The vapor pressure of pure methanol at 27 degrees celcius is 140 mm Hg.
Wednesday, March 9, 2011 at 11:36am by kyle

chemistry
By how much will the vapor pressure of water decrease if a solution at 40.0C is produced by dissolving 16.0212 g of K3PO4 (formula mass = 212.30 g/mol) with 40.8480 g of water. The vapor pressure of pure water at this temperature is 55.30 mmHg. If the solute is ionic, assume ...
Friday, February 21, 2014 at 3:36pm by kat

CHEM
Calculate the vapor pressure at 25 C of hexane above the solution. The vapor pressure of pure hexane at 25 C is 151 torr. A solution contains naphthalene ({\rm{C}}_{10} {\rm{H}}_8) dissolved in hexane ({\rm{C}}_6 {\rm{H}}_{14}) at a concentration of 12.17 \% naphthalene by mass.
Saturday, June 5, 2010 at 10:31pm by AMI

chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. independent of the chemical identity of the solute. C. dependent on the ...
Monday, October 4, 2010 at 1:58pm by jay

Chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. dependent on the mass of solute present. C. independent of the chemical ...
Friday, August 8, 2008 at 1:06am by Blair

chem
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. dependent on the mass of solute present. C. independent of the chemical ...
Friday, August 8, 2008 at 3:25pm by sonia

chem lab (webwork)
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. independent of the chemical identity of the solute. C. responsible for lowering the vapor pressure of a solution versus the vapor pressure...
Saturday, April 3, 2010 at 12:02am by UCI studebt

chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. C. independent of the chemical ...
Monday, April 7, 2008 at 6:36pm by david

CHEM HELP
Which of the following is NOT true of colligative properties? Colligative properties are... a) dependent on the molar mass of the solute. b) dependent on the mass of solute present. c) responsible for lowering the vapor pressure of a solution versus the vapor pressure of the ...
Thursday, April 2, 2009 at 11:55pm by steven

Chemistry
An example of a solution that exhibits a positive deviation from Raoults Law (total pressure is greater than expected) is a solution of acetone (CH3COCH3) and carbon disulfide (CS2). a) Draw Lewis structures for these molecules. Explain the deviation from ideal behavior in ...
Sunday, March 11, 2012 at 4:14am by Laffy Taffy

Chemistry
1 is in the right ball park but the wrong direction. For #1, both salt and sugar lower the vapor pressure of the solution compared to that of pure water. Lowering the vapor pressure of water means that it must be raised to a higher temperature before it reaches 1 atmosphere ...
Thursday, January 17, 2008 at 9:02am by DrBob222

Chemistry
Look up the vapor pressure of H2O at various temperatuares. I assume you have a table in your text/notes; otherwise, you can look on the web. Look for a vapor pressure of 520 mm and the temperature that produces that will be the boiling point. WHY? Because boiling point is ...
Tuesday, October 4, 2011 at 3:50pm by DrBob222

chemistry
A bottle of rubbing alcohol (C3H7OH) from the store is a 70% solution by mass. Determine the total vapor pressure inside the closed bottle. The vapor pressure of the water at room temperature is 24mmHg; the vapor pressure of the volatile rubbing alcohol is 44mmHg.
Thursday, April 17, 2008 at 5:04pm by billy bob j

Chemistry
C is correct. 1 M concn is the standard state for solutions. B is not true. A pure liquid need NOT have a vapor pressure of 1 atm. If it's a pure liquid, then it has its normal vapor pressure at 25 degrees C. Some notes here, which probably were not meant to apply to this ...
Saturday, May 17, 2008 at 8:09pm by DrBob222

Chemistry....help
find the water vapor pressure from the temperature, and subtract that pressure from your observed pressure. At 25C, water vapor pressure is 23.8 mmHg (check that) so your observed pressure then was 757.5mmHg-23.8mmHg. Now, you have pressure and volume at that pressure, convert...
Tuesday, July 3, 2012 at 9:19am by bobpursley

Chemistry
Total pressure is 750 mm Hg. Total pressure = pressure H2 + pressure water vapor. Look up the vapor pressure of water at 22 C.
Friday, February 19, 2010 at 12:12am by DrBob222

Chem, could someone cheak my work please.
Ok, for 3) you need the volume of butane you measured, and the pressure of that butane. The pressure of the butane is atmospheric minus water vapor pressure (there is water vapor in there). You get the water vapor pressure from a water vapor pressure table, knowing the ...
Friday, December 12, 2008 at 2:31am by bobpursley

eng
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. independent of the chemical identity of the solute. C. dependent on the molar mass of the solute. D. responsible for lowering the vapor ...
Wednesday, April 7, 2010 at 12:51am by bme1

chemistry
According to Raoult's law, which statement is false? a. The vapor pressure of a solvent over a solution decreases as its mole fraction increases. b. The solubility of a gas increases as the temperature decreases. c. The vapor pressure of a solvent over a solution is less than ...
Friday, March 14, 2008 at 9:30pm by thanh

chemistry
The vapor pressure of pure water at 70C is 231 mm Hg. What is the vapor pressure depression of a solution of 115 g of the antifreeze ethylene glycol, C2H6O2, a nonvolatile compound, in 205 g of water? Use molar masses with at least as many significant figures as the data ...
Wednesday, December 12, 2012 at 6:20pm by Brad

Chemistry
Calculate (you only need to know the relative difference and not exact numbers) vapor pressure of the soln and compare with the vapor pressure of the pure solvent. Which is larger? So which should evaporate faster. I should point out that this calculation gives only the values...
Sunday, February 6, 2011 at 11:34pm by DrBob222

chemistry
Methanol boils at 65Celcius. The vapor pressure of ethanol at 65Celcius is at 410 torr. for a mixture containing .200 mol of methanol and .100 mol of ethanlol (at 65 Celcius) calculate the: 1. partial pressure of each liquid 2. total vapor pressure of the solution 3. percent ...
Sunday, October 25, 2009 at 12:12pm by Cerise

Chemistry...
Total pressure= sum of the partial pressures 762 torr-water vapor pressure=O2 pressure water vapor pressure at 25C =23.756 torr But check the reference value.
Wednesday, February 20, 2013 at 7:11pm by Devron

Chemistry
Hey guys I was wondering if you guys know the answer to this: Which of the following is NOT true of colligative properties? Colligative properties are... A. independent of the chemical identity of the solute. B. responsible for lowering the vapor pressure of a solution versus ...
Sunday, April 11, 2010 at 1:05am by Alex

Chemistry
Butanone, CH3CH2COCH3, has a vapor pressure of 100. Torr at 25C; at the same temperature, propanone, CH3COCH3, has a vapor pressure of 222 Torr. What mass of propanone must be mixed with 322.0 g of butanone to give a solution with a vapor pressure of 135 Torr? Assume ideal ...
Wednesday, February 10, 2010 at 3:29am by Cairy

P. Chemistry
Can anyone direct me on how to solve this problem? All of the variables are makin my head spin--not sure how to organize them. If you can give equations to use that would help.Thnx! 1 L of an impure water solution has a freezing point of -11 C. Which of the following is the ...
Sunday, March 7, 2010 at 10:53pm by Tommy

chemistry
Calculate the vapor pressure lowering of water when 5.67 g of glucose, C6H12O6, is dissolved in 25.2 g of water at 25 C. The vapor pressure of water at 25 C is 23.8 mmHg. What is the vapor pressure of the solution?
Thursday, March 29, 2012 at 5:51pm by MJ

chemistry
Look up the vapor pressure of water at 35 degrees celsius (note the correct spelling of celsius) and add it to the pressure of N2 gas. Probably the water pressure will be listed in mm Hg and you must convert either N2 pressure or vapor pressure H2O before adding.
Friday, April 9, 2010 at 7:05pm by DrBob222

AP Chemistry
Will a non-volatile solute always lower the vapor pressure of the pure solvent in solution? Why or why not?
Saturday, November 21, 2009 at 6:33pm by Anonymous

Chemistry
The boiling point of a solvent is the temperature at which the vapor pressure of the solvent equals atmospheric pressure (the pressure surrounding the solvent in the case of a capped flask). So, a boiling solution means the vapor pressure = 760 mm Hg if the atmospheric ...
Monday, April 11, 2011 at 3:13pm by DrBob222

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