Tuesday
September 2, 2014

Search: Calculate the freezing point of a solution of 2.50 g of Al(NO3)3 in 13.40 g of water. (ans in oC and assume no ion pairing occurs.)

Number of results: 61,976

chemistry(Please check)
1) In comparing the phase diagram for water with that of a solution of sugar in water, all of the following decrease except a) the vapor pressure b) the boiling point c) the freezing point d) the triple point I chose the boiling point as the answer. Is this correct? Thank you.
February 10, 2012 by Hannah

chemistry
calculate the freezing point of an aqueous solution of 15.5 grams of glucose dissolved in 150 grams of water
March 22, 2014 by Sara

Chemistry
Vitamin K is involved in normal blood clotting. When 2.40 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 8.05 C. The freezing point and Kf constant for camphor can be found here. Calculate the molar mass of vitamin K.
October 16, 2013 by Shardai

Chemistry
Vitamin K is involved in normal blood clotting. When 2.40 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 8.05 C. Calculate the molar mass of vitamin K. Kf value is 37.8 and the normal freezing point is 176 degrees C
October 17, 2013 by Shardai

Gen Chem II
Vitamin K is involved in normal blood clotting. When 1.36 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 4.56 C. The freezing point and Kf constant for camphor can be found here. Calculate the molar mass of vitamin K.
February 10, 2013 by Nefret

Chemistry II
An unknown solute (a nonelectrolyte) was obtained and 5.37 g was weighed out. After dissolving the solute in water, the mass of the solution was 26.58 g. From the experimental results, the freezing point depression was found to be 3.6oC. If the freezing point depression ...
September 8, 2009 by Lindsay

science
When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these solutions, however, are higher...
May 12, 2010 by kayci

chemistry
1. Would it be advisable to determine the freezing point of pure p-dichlorobenzene with one thermometer and the freezing point of the solution with a different one? Explain. 2. If 0.150 mole of a nonvolatile non-electrolyte solute is present in 1200g of water, what are the ...
February 2, 2012 by Larry

chemistry
Calculate the freezing point of a solution contaning 5.0 grams of KCl and 550.0 grams of water. answer is -0.45 C but i don't know how to get here
October 4, 2012 by Paloa

Chemistry
A solution is made by dissolving 0.526 mol of nonelectrolyte solute in 831 g of benzene. Calculate the freezing point and boiling point of the solution. Constants may be found here.
February 21, 2012 by Heather

ecc
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)
April 15, 2013 by george

chemistry
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)
April 15, 2013 by george

chemistry
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)
April 15, 2013 by george

chemistry
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)
April 15, 2013 by george

Chemistry
5.00kg glycol, C2H4(OH)2, [this is anti-freeze!] is added to your radiator. If your radiator contains 12.0kg of water, what would be the freezing point of the water-antifreeze mixture? The molal freezing point depression constant for water is 1.86 degrees celsius x kg/mole.
March 20, 2011 by Cassie

chemistry... please help!
Pure glacial acetic acid HC2H3O2 has a freezing point of 16.62 degrees C. Its freezing point depression constant is Kf=3.57 Cm^-1. A solution was made by taking 9.755 g of an unknown non-electrolyte and dissolving it in 90.50 g of glacial acetic acid. The measured freezing ...
February 13, 2009 by Anonymous

molal
the freezing point of ethanol (C2H5OH) is -114.6C. the molal freezing point depression constant for ethanol is 2.00C/m. what is the freezing point (C) of a solution prepared by dissolving 50.0 g of glycerin (C3H8O3, A nonelectrolyte) in 200 g of ethanol. any help would be ...
September 13, 2010 by lisa

molal
the freezing point of ethanol (C2H5OH) is -114.6C. the molal freezing point depression constant for ethanol is 2.00C/m. what is the freezing point (C) of a solution prepared by dissolving 50.0 g of glycerin (C3H8O3, A nonelectrolyte) in 200 g of ethanol. any help would be ...
September 13, 2010 by lisa

molal
the freezing point of ethanol (C2H5OH) is -114.6C. the molal freezing point depression constant for ethanol is 2.00C/m. what is the freezing point (C) of a solution prepared by dissolving 50.0 g of glycerin (C3H8O3, A nonelectrolyte) in 200 g of ethanol. any help would be ...
September 14, 2010 by lisa

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 ...
March 20, 2013 by N COMAS

Chemistry
The boiling point of an aqueous solution is 102.48 C. What is the freezing point? I know that formula for freezing point is delta Tf = Kf*m but what do I plug in for each?
January 29, 2013 by Anon

Chemistry
calculate the freezing and boiling points of each of the following solutions. (a) 0.37 m glucose in ethanol freezing point ______I got -1.2e2 but its wrong_______C boiling point _________I got 1.1e2 but its wrong:(____C (b) 15.0 g of decane, C10H22, in 37.9 g CHCl3 freezing ...
March 24, 2011 by Rebekah

Chemistry
Calculate the freezing point and boiling point of each of the following solutions A. 2.75m NaOH in water B. 0.586m of water in ethanol c. 1.26m of naphthalene (C10H8) in benzene
February 10, 2010 by Laverne

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 ...
March 19, 2013 by N comas

chemistry
Could someone help me with these problems? 1. Why is it advantageous to choose a solvent with a large value for k(fp)? I don't really know 2. Why is it not necessary to wait for an entire sample of water to freeze in order to determine its freezing point? I think it has ...
March 4, 2009 by Karthik

chemistry
this is a really long question. i don't understand how to answer it. help please. A 10.0% aquueous solution of sulfuric acid has a density of 1.0661 g/mL at 20 degrees celsius. A. how many grams of H2SO4 are found in 50.0 g of this solution? B. how many grams of water are ...
April 7, 2013 by Nicole

physics
What are the temperatures for freezing water and boiling water on the Kelvin temperature scale? a)273K for freezing water; 373K for boiling water b)0K for freezing water; 100K for boiling water c)32K for freezing water; 212K for boiling water
March 29, 2012 by Kristie

Chemistry
An aqueous salt solution is formed by adding 11.67 g sodium sulfate (solute) to water (solvent). What mass (in g) of water is used if the freezing point of the solution is -12.9 Farenheit. Kf H2O = 1.86 Celsius/m
February 24, 2012 by jenny

Chemistry problem
What is the expected freezing point of a 3.50 m aqueous solution of BaCl2 (Kfp=1.86C/m)? What is the boiling point (Kbp=0.512C/m? & which is affected to the greater extent, the boiling point or the freezing point?
November 12, 2009 by Dan

Chemistry(Please Check)
You dissolve 6.55 g of potassium nitrate in enough water to make a 250. ML solution. 1.What is the molarity of this solution?answer:0.0262 2.If you took out 15.0 mL of this solution, how many moles of potassium nitrate would you have?answer:0.393 3. What is the percent (m/v) ...
April 23, 2012 by cateye

Chemistry
Which of the following solutes, dissolved in 1000g of water, would provide a solution would the lowest freezing point? .030 mol of BaCl2, CO(NH2)2, CaSO4, CH3COOH, or .030 mol of NH4NO3 Again, the steps needed to determine for the freezing point.
February 19, 2013 by Marcus

chem
An ethylene glycol solution contains 23.9 g of ethylene glycol (C2H6O2) in 86.9 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.)
May 21, 2011 by Sara

Chemistry
40.0 g of magnesium chloride (MgCl2) in 250.0 g of water at 22 C.Calculate a) the vapor pressure of this solution, b) the freezing point, c) the boiling point. I know it is something like this, but I continue to get the incorrect answer. A) 40.og Mgcl2*(1mol mgcl2/ 95.2 mgcl2...
May 23, 2013 by Jasmine

Chemistry
The freezing point of a cyclohexane sample is 6.20*C. A soltuion is prepared by dissolving 0.4660g of an unknown solute in 36.0g cyclohexane. The freezing point of the solution if 4.11*C. Calculate the molar mass of the unknown solute. Kf for cyclohexane is 20.0*Ckg/mole.
March 14, 2011 by K

science
Using data from this table of molal boiling-point-elevation and freezing-point-depression constants, calculate the freezing and boiling points of each of the following solutions. a)0.39 m glucose in ethanol (b) 22.8 g of decane, C10H22, in 53.9 g CHCl3 (c) 3.90 g NaOH in 109 g...
January 23, 2013 by Hannah

Chemistry II
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 3.28 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 8.43 C. The ...
July 17, 2012 by Sam

chemistry
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 2.50 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 6.43 C. The ...
March 25, 2014 by sam

Chemistry
Explain why the freezing point of a pure solvent is constant, whereas the freezing point of a solution decreases with steady cooling.
March 20, 2011 by Cassie

science
What is the boiling point of a solution of 0.150g of glycerol in 20g of water? What is the freezing point?
January 28, 2013 by Absa

chemistry
How do I calculate the freezing point of 11.3g FeCl3 in 155g water? I know how to calculate i and m but how do you find Kf?
December 4, 2012 by Farah Massardi

science
When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these solutions, however, are higher...
May 12, 2010 by kayci

math
the tangent yo the curve y=x^2 +5x -2 @ the point (1,4)intersect the normal to the same curve @ the point (-3,-8) at the point P.Find the coordinates of point P.[ans: -1/3,-16/3] just give me some hint to calculate this solution.
July 22, 2011 by rob

chemistry
if Kf for water is 1.86 geg mol-1, a 0.1m solution of NaCl in water will have freezing point of
April 23, 2012 by pratik

Chemistry
A biochemical engineer isolates a bacterial gene fragment and dissolves a 11.8 mg sample of the material in enough water to make 36.1 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25C. (a) What is the molar mass of the gene fragment?(in g/mol) (b) If ...
February 16, 2013 by Stevi

chemistry
What are the freezing point and boiling point of an aqueous solution of 15.5 g glucose(C6H12O6) dissolved in 150 g of water?
April 7, 2013 by Daniel

chemistry
i need to know if I am in the right tract please let me know...I am calulating the molality of the following exercise so I could be able to apply the formula T=Kf * molality calculate the freezing point of a solution containin 12.2 grams of benzoic acid, dissolved in 250 grams...
October 27, 2008 by Joshua

Chemistry
Calculate the freezing point and boiling point of a solution that contains 55.4 NaCl and 42.3g KBr dissolved in 750.3 ml H2O
February 10, 2010 by Laverne

chem
Calculate the freezing point and boiling point of a solution that contains 57.0 g NaCl and 53.4 g KBr dissolved in 750.3 mL H2O
March 3, 2011 by Anonymous

Chemistry
3.92g of a nondissociating compound are dissolved in 400.g of liquid benzene. The freezing point of the solution is 5.19 degrees celsius. Calculate the molar mass of the compound. (The freezing point of the pure benzene is 5.50 degrees celsius and its molal freezing point ...
March 20, 2011 by Cassie

Bio Chem
What would the freezing point of water be if one prepared a 10 m solution of urea in water? (Tfp = 1.86C/m x m)?
November 29, 2010 by Anonymous

Gifted Chemistry
Calculate the freezing point and boiling point of a solution that contains 56.8 g NaCl and 32.0 g KBr dissolved in 750.3 mL H2O.
April 16, 2013 by Alex

Chemistry
When 0.855 g of this solid was dissolved in 7.50 g of napthalene, the solution had a freezing point of 78.0 C. The pure solvent freezes at 80.0 C; its molal freezing point constant is 6.8 C/m. What is the molecular formula of the compound?
January 17, 2011 by Justyn

science
When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these solutions, however, are higher...
May 12, 2010 by kayci

Chemistry
the following questions are about colligative properties: a)How much would the freezing point change in a 2.5 solution of phenol in benzene? b)how much would the boiling point change in a 1.m solution of magnesium chloride in ethanol? c)Does adding sugar to water raise or ...
May 2, 2010 by Kim

CHM
From the following: 1) pure water 2) 0.01 m solution of table sugar (C12H22O11) 3) 0.01 m solution of NaCl 4) 0.01 m solution of CaCl2 Choose the one with the largest van't Hoff factor and hence the lowest freezing point.
February 9, 2010 by CC

Chemistry
From the following: 1) pure water 2) 0.01 m solution of table sugar (C12H22O11) 3) 0.01 m solution of NaCl 4) 0.01 m solution of CaCl2 Choose the one with the largest van't Hoff factor and hence the lowest freezing point.
February 9, 2010 by CC

Chem
a chemist is asked to identify 2 solutions whose labels have peeled off. One is known to contain 1.0 mol of NaCl, the other is 1 mol of Na2CO3. Both solutes are dissolved in 1 kg of water. If the chemist measures the freezing point of each solution, can it identify which is ...
April 30, 2007 by Kim

chemistry
Calculate the molar mass of a non-electrolyte that lowers the freezing point of 25.0 g of water to - 3.9 oC when 4.27 g of the substance is dissolved in the water.
October 1, 2012 by Danica

chemistry
calculate the freezing point and osmotic pressure at 25 degrees celcious of an aqueous solution containing 1.0 g/L of a protein (mm=9.0*10^4g/mol) if the density of the solution is 1.0 g/cm^3
February 8, 2010 by heather

CHEMISTRY
Assuming equal concentrations, rank these aqueous solutions by their freezing point: LiSO4, Li3PO4, SnCl4, NH4Br. (from highest freezing point to lowest freezing poinT) Thanks.
February 18, 2012 by Kylie

chemistry, freezing point depression
Hey guys I did a lab and I have to answer the questions relating to the lab. I did question 1 & 2, can someone check if they are correct, and question 3 I don't know how to do it. 1. Calculation to Determine the molecular weight of unknown substance Mass of unknown used: 2.0 g...
February 6, 2009 by Sev

Chemistry II
100 grams of KNO3 is dissolved in one liter of water. Calculate the freezing point depression and boiling point elevation.
March 14, 2011 by Michelle

chemistry
If the freezing point of the solution had been incorrectly read 0.3degrees C lower than the true freezing point, would the calculated molar mass of the solute be too high or too low? Explain.
February 20, 2013 by mm

chemistry
an aqueous solution containing 17.5g of an unknown molecular(nonelectrolyte) compound in 100.0g of water has a freezing point of 1.8 degress C. calculate the molar mass of the unknown compound
November 5, 2011 by Monique

chemistry
please check if I did this right ... calculate the mass of white solid CaCO3 that forms when 98ml of a 0.1M Ca(NO3)2 solution is mixed with 54 ml of a 2.5M Na2CO3 solution. Ca(NO3)2 + 2NaCO3 -> Ca(CO3)2 + 2NaNO3 .098*0.1 =.0090 .054*2.5 =.135 limiting reactant is Ca(NO3)2 ....
January 29, 2010 by Krissy

Chemistry
An aqueous solution of a non electrolyte boils at 100.32 degrees C. The expected freezing point for this solution is ______? (Kb water = 0.512 degrees Cm^-1, Kf water= 1.86 Degree C m^-1) a. 0 Degrees b. -0.32 c. -0.83 d. -1.16 e insufficient information
February 25, 2008 by Lauren

Chemistry II
Calculate the freezing point of a 0.75 m solution of Al2(CO3)3.
September 16, 2009 by Chase

Food Analysis
1.If 0.5l of 5M solution of CU(NO3) is diluted to a volume of 0.80l by adding water, what is the molarity of the resulting diluted solution? 2.How many ml of water will be required to dilute 11ml of 0.45Macid solution to a molarity of 0.1M? 3.Calculate the weight CuSO4.5H2O ...
March 8, 2011 by Sarah

Chemistry
Suppose we have a solution of lead nitrate, Pb(NO3). A solution of NaCl(aq) is added slowly until no further precipitation occurs. The precipitate is collected by filtration, dried and weighed. A total of 10.27g of PbCl2(s) is obtained from 200.0mL of the original solution. ...
April 17, 2013 by Katherine

science
hi guys I really need some help with my homework its so confusing here it is. 5.00g of glucose,C6H12O6, is dissolved in 500g of acetic acid. What is the new freezing point and boiling point for the solution? Kf,acetic acid = 3.90 Kb,acetic acid = 3.07 (normal freezing point ...
March 24, 2007 by stacy

Chemistry: Freezing point depression
What is the free sing point of a solution of ethyl alchohol, that contains 24g of the solute (C2H5OH), dissolved in 780 g of water
March 11, 2014 by Matt

chemistry
calculate the freezing point of 12.0g FeCl3 in 142g water...
February 24, 2012 by globamabob

Chemistry
Vitamin K is involved in normal blood clotting. When 1.05 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 3.53 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar mass of vitamin K. I ...
March 26, 2014 by Alyssa

Chemistry
a solution of 0.2113 g of water dissolv ed in 25g of a solvent freezes at 11.5 degrees celcius below the freezing point of the solvent. what is the Kf for the solvent? A)0.735 B)1.36 c)5.39 D)24.5 Help!!! delta T = Kf*molality Calculate molality = #mols solute/kg solvent, plug...
April 27, 2007 by natali

chem- molar weight
I worked this problem, I would like to know if I did it correctly, I think I missed something, I'm not sure..... When a 20.0 gram sample of an unknown compound is dissolved in 500 grams of benzene, the freezing pointof the resulting solution was observed to be 3.77 degrees C. ...
September 7, 2007 by manny

chemistry
What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 20.0 L of water to produce an antifreeze solution with a freezing point of -28.0C? (The density of ethylene glycol is 1.11 g/cm3, and the density of water is 1.00 g/cm3.) .....L What is the boiling ...
November 30, 2008 by Rita

Chemistry
Some physical properties of water are shown below. freezing point 0.00C boiling point 100.00C Kf 1.86C/m Kb 0.512C/m A 16.0 g sample of a compound known to contain 3 ion species is dissolved in 100. g of water. The boiling point of the solution is 103.6C. What is the ...
September 9, 2010 by Tiffany

chemistry
An ethylene glycol solution is mad using 58.5g of (C2H6O2) and diluting to a total volume of 500.0 mL. Calculate the freezing and boiling point. Assume a density of 1.09 g/ml for the solution
November 5, 2011 by Monique

chemistry
calculate the freezing point of a .05500 m aqueous solution of NaNO3
February 12, 2012 by Cece

science
When 10grams of sodium chloride, NaCL,dissolves in 100grams of water, the freezing point of the water gose down to -5.9C. when 10grams of table sugar C H O, dissolves in 100grams of water, the freezing point only goes down to - 0.56C. how do yo0u account for this difference?
April 23, 2013 by Jessica

Chemistry
A student dissolves 18.9 grams of Zn(NO3)2 [molar mass = 189] in enough water to make 500.0 of solution. A 100.0 ml portion of this solution is diluted to 1000.0 ml.What is the [NO3 ] in the second solution? A) 0.0100M B) 0.0200M C) 0.0300M D) 0.0400M E) 0.0500M
February 8, 2011 by Paul

Chemistry
A student dissolves 18.9 grams of Zn(NO3)2 [molar mass = 189] in enough water to make 500.0 of solution. A 100.0 ml portion of this solution is diluted to 1000.0 ml.What is the [NO3 ] in the second solution? A) 0.0100M B) 0.0200M C) 0.0300M D) 0.0400M E) 0.0500M
February 9, 2011 by Paul

chemistry
When an aqueous solution is cooled to low temperatures, part of the water freezes as pure ice. What happens to the freezing point of the remaining solution when this occurs? Explain.
January 31, 2009 by Anonymous

Chemistry
A 1.00% by mass MgSO4 solution has a freezing point of -.192C. Water has a Kf of 1.86 (KxKg)/mol. a.) Estimate the vant Hoff i factor from the data. b.)Determine the total molality of all solute species. c.) Calculate the percentage dissociation of MgSO4 in this solution. I ...
January 27, 2014 by Anonymous

Chemistry
for a question it is given that there is 14.6 g of calcium chloride in 246 g of water. Kf is 1.86 C/m we need to find the freezing point of this solution. when i do the calculations, i get the freezing point to be -0.99 (without using the vant hoff factor i) or i get -2.98 (...
November 8, 2012 by Ania

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...
January 15, 2011 by Mark

Chemistry
1) Write a balanced chemical equation for the reaction between Cu(NO3)2 * 3 H2O and NaOH. Underline the formula for the precipitate produced by this reaction. (The water of hydration in Cu(NO3)2 * 3 H2O appears as liquid water on the right side of the equation) 2) Calculate ...
May 17, 2010 by Sarah

Chemistry
Consider a 9% by mass aqueous ethyl alcohol solution. a.) Calculate the molality of this solution_____m b.) Given that ethyl alcohol is a molecular solute, calculate the freezing point of this solution. ________ degrees Celsius. c.) Consider the boiling point of each solution...
June 24, 2014 by amber

Chemistry
Calculate the molecular mass of the nonionic solutes. 8.02 grams of solute in 861 grams of water lower the freezing point to -0.430 celsius. the freezing point of H2O is lowered 1.86 celsius per mole of solute. the boiling point of H2O is raised 0.512 celsius per mole of solute.
November 22, 2010 by Jose Reyes

Chemistry
Which solution will have the lowest freezing point? 0.25 molal aqueous solution of sucrose 0.5 molal aqueous solution of glucose solution of 180 g of glucose (MW = 180.2 g/mol) in one kg of water. pure water
June 11, 2010 by amanda

Chemistry
The molal boiling-point constant for water is 0.51 degrees C/molal. The boiling point of a 1.00 molal solution of Ca(NO3)2 should be increased by: A.) exactly 1.53 or B.) Somewhat less than 1.53 This is how I worked the problem: Ca(NO3)2 dislocates into 3 mole particles. ...
February 21, 2013 by Marcus

Chemistry HELP ME!!!!
A sloution of calcium nitrate, C(NO3), reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2, and ammonium nitrate, NH4NO3(ag). When 45.00 mL of 4.8724 x 10 -1M Ca(NO3)2 solution was added to 60.00 mL of 9.9981 x 10 -1M NH4F solution, 1.524g ...
February 10, 2010 by Macey

Chemistry II
If the freezing point depression (DTf) is 5.62 and the freezing point depression constant (Kf) is 3.90, what is the molality of the solution? Assume that the solute is a nonelectrolyte (i = 1).
September 8, 2009 by Lindsay

Chemistry
A volume of 45.3mL of .719 M Ca(NO3)2 solution is mixed with 82.3mL of 1.409M Ca(NO3)2 solution calculate the concentration of the final solution
October 10, 2010 by Jorge

Physical Chemistry
When 3.78 g of nonvolatile solute is dissolved in 300.0 g of water, the freezing point depression is 0.646 o C. Calculate the molar mass of the solute. The cryoscopic constant of water is 1.86 K kg mol -1. When 3.78 g of nonvolatile solute is dissolved in 300.0 g of water, the...
October 12, 2006 by Lan

Chemistry 120
A sloution of calcium nitrate, C(NO3), reacts with a solution of ammonium fluoride, NH4F, to form solid calcium fluoride, CaF2, and ammonium nitrate, NH4NO3(ag). When 45.00 mL of 4.8724 x 10 -1M Ca(NO3)2 solution was added to 60.00 mL of 9.9981 x 10 -1M NH4F solution, 1.524g ...
February 10, 2010 by Macey

chemistry
Ok, in my lab, I measured the freezing point of NaNO3 and it was 0.79 C and I have to answer the question: Why might your measured value of the freezing point of water not equal 0oC?
January 31, 2009 by Anonymous

chemistry
the addition of 50 g of salt to a sample of pure water causes its freezing point to be reduced from 0.0 C to -3. 15 C. Determine how by how many degrees the freezing point dropped for every 10 g of salt added?
January 29, 2013 by Ya Girl

Chemistry
assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and is equal to 1.86 C/m .
January 27, 2012 by Colin

Chemistry
3) The chemical formula for ethylene glycol (antifreeze) is C2H6O2 and Isopropyle alcohol is C3H7OH. Calculate the new boining and freezing oints for 1000.0 g of aqueous solution (total volume), that is 30.0% solute (the antifreeze and the alcohol are the solutes). You will ...
May 19, 2011 by Adam

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