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April 18, 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: 114,644

Chemistry
I was just wanting to make sure I did these right. How many grams of solute are in each of the following solutions? a.) 2.5 L of 3.0 M Al(NO3)3 solution. for this one I get 1600 g of Al(NO3)3 b.) 75 ml of 0.5 M C6H12O6 solution. and for this one I get 6.8g of C6 H12 O6 How ...
Monday, November 29, 2010 at 4:12pm by Carrie

physical science
Dissolving sodium chloride in water will 1: raise the freezing point of the solution, 2. raise the freezing point of the sodium chloride, 3. lower the freezing point of the solution, or 4. lower the freezing point of the sodium chloride?
Tuesday, November 6, 2007 at 3:01pm by palmer

Chemistry
2Al(NO3)3 + 3K2CrO4 ==> 6KNO3 + ? mols Al(NO3)3 = grams/molar mass = ? Convert to mols KNO3 using the coefficients in the balanced equation. ?mols Al(NO3)2 x [6 mol KNO3/2 mol Al(NO3)3]= ? = mols KNO3.
Wednesday, December 12, 2012 at 1:56am 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

ap chem
Find the molecular mass of a solute by freezing point depression. Solvent: para-dichlorobenzene Freezing point of pure solvent: 53.02C Mass of unknown substance: 2.04g Freezingpointdepressin constant:7.1c/m Mass of para-dichlo...: 24.80g Freexing point solution: 50.78 C Can ...
Tuesday, April 13, 2010 at 11:44pm by anonymous

Chemistry
If the freezing point of pure toluene is -95.15 oC and its freezing point depression constant is -8.38 oC/molal, what is the freezing point of a solution made by dissolving 39.338g of anthracene (C14H10) in 150.0mL of toluene? (Density of toluene = 0.8669g/mL)
Wednesday, January 30, 2013 at 9:34pm by Jaden

Chemistry
A solution of magnesium chloride, MgCl2, is prepared by dissolving 19.0g of MgCl2 in 250 mL OF water. a.) Calculate the weight percent of magnesium chloride in solution. b.)The denstiy of the above solution is 1.05 g/mL. Calculate the molarity of the magnesium chloride ...
Wednesday, October 24, 2012 at 8:22pm by Josh

Chem
A solution is made by dissolving 0.584 mol of nonelectrolyte solute in 883 g of benzene. Calculate the freezing point and boiling point of the solution. Tf=? Tb=? I got Tf as 3.39 degrees Celsius I got Tb as 1.67 degrees Celsius It marked me wrong and said "You have given the ...
Saturday, February 18, 2012 at 10:34pm by Jen

chemistry
Data: freezing point of pure cyclohexane: 6.0 degrees celcius Freezing point of unknown soluton: 1.6 degrees celcius weight of cyclohexane: 40.0231g=0.0400231 kg weight of unknown solute: 0.4872 g K_f_ of cyclohexane: -20.00 degrees Celciusx kg/mole questions: 1. what is the ...
Monday, May 2, 2011 at 12:56am by Tina

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 ...
Thursday, March 24, 2011 at 7:09pm by Rebekah

chemistry
You should be learning to do this yourself. Here is the easy way and one you can do in your head. Al^3+ and NO3^- In your mind write +3 above Al and write -1 above NO3. Place parentheses around the NO3. Mentally draw an X. The left leg goes from the 3 above Al to the bottom of...
Thursday, September 27, 2012 at 1:31pm by DrBob222

Chemistry (Regents level)
1- In the reaction Fe2O3 + 3 CO = 2 Fe + 3 CO2, what is the total number of moles of CO used to produce 112 grams of iron? a) 1.0 b)2.0 c)3.0 d)4.0 2- Given the reaction: 4Al + 3O2 = 2Al2O3 How many moles of Al2O3 will be formed when 27 grams of Al reacts completely with O2? a...
Saturday, February 23, 2008 at 2:04pm by Jessica

Chemistry
Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram. a. Determine the freezing ...
Tuesday, January 28, 2014 at 12:56am by Sam

grade 12 chemistry
Q. a 50g sample of Al(NO3)3 is dissolved in water to prepare 1500ml of solution. What is the concentration, in mol/L, of NO3 ions in the solution? -The answer is 0.47 mol/L but I don't know how to solve it.
Wednesday, February 4, 2009 at 4:54pm by wiz

Chemistry hw
Assuming 100% dissociation, calculate the freezing point and boiling point of 3.13 m SnCl4(aq). Tf=? Tb=? My work: SnCl4 with 100% dissociation gives a van't hoff factor of 5, 1Sn 4+ ion and 4 Cl- ions deltaT = i x Kf x m for freezing point = 5 x 0.51C/m x 3.13m = deltaTf ...
Sunday, February 19, 2012 at 1:41am by Akle

Chemistry
delta T = Kf*m, then solve for freezing point knowing that 0C is the normal freezing point of an aqueous solution.
Tuesday, January 18, 2011 at 12:39am by DrBob222

Chemistry
Pure benzene has a normal freezing point of 5.50 degrees Celsius. A solution containing 11.4 grams of a molecular substance dissolved in 150.0 grams of benzene (Kf=5.12C/m) has a freezing point of 1.20 degrees Celsius. What is the molar mass of the solute?
Monday, March 22, 2010 at 7:31pm by Katelynn

Chemistry
Explain why the freezing point of a pure solvent is constant, whereas the freezing point of a solution decreases with steady cooling.
Sunday, March 20, 2011 at 11:39pm by Cassie

chemistry
calculate the freezing point of an aqueous solution containing 10.50 g of MgBr2 in 200 g of water (MgBr2=184 g, Kf for water =1.80 K kg mol-1)
Wednesday, June 12, 2013 at 6:41am by rahul

Chemistry
Cyclohexane has a freezing point of 6.6 degree Celsius and a K(f) of 20.0 degree Celsius/m. 1.50g of an unknown solute is dissolved wth 18.0g of cyclohexane. The freezing point of the solution was 1.3 degree Celsius Using this iInformation assuming the solute doesn't ...
Monday, May 27, 2013 at 9:08pm by Michael

chemistry
A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC. Calculate the molar mass of the substance. The normal freezing point for benzene is 5.53 oC and Kf is 5.12 oC/m.
Tuesday, February 9, 2010 at 11:41pm by CC

chemistry
A 0.750 g sample of an unknown substance is dissolved in 20.0 g of benzene, C6H6. The freezing point of the solution is 4.53 oC. Calculate the molar mass of the substance. The normal freezing point for benzene is 5.53 oC and Kf is 5.12 oC/m.
Tuesday, February 9, 2010 at 11:42pm by CC

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.
Monday, March 14, 2011 at 11:28pm by K

Chemistry
Lake VIda is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of this water is approximately -15.0 degrees C, owing to the fact that it is many times as salty as typical saltwater. Calculate the osmotic ...
Monday, October 18, 2010 at 5:49pm by Shea

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 ...
Tuesday, July 17, 2012 at 8:09pm by Sam

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
Thursday, March 3, 2011 at 5:45pm by Anonymous

chem
A solution prepared by dissolving 3.00 grams of ascorbic acid (vitamin C, C6H8O6), in 50.0 grams of acetic acid has a freezing point that is depressed by T = 1.33 oC below that of pure acetic acid. What is the value of the molar freezing point-depression constant for acetic ...
Monday, February 18, 2013 at 10:57pm by Ace

Chemisty-Freezing Points
The freezing point of benzene is 5.5C. What is the freezing point of a solution of 8.50 g of naphthalene (C10H8) in 425 g of benzene (Kf of benzene = 4.90C/m)? delta T = Kf m m = mols/kg solvent. Change 8.5 g naphthalene to mols and 425 g benzene to kg. That will get delta T...
Sunday, January 21, 2007 at 9:51pm by Swim4eva

Chemistry
which property of a distilled water solution will not be affected by adding 50 mL of CH3OH to 100.mL of the water solution at 25? conductivity mass freezing point boiling point please help
Wednesday, February 23, 2011 at 10:55pm by Penny

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
Wednesday, February 10, 2010 at 11:55pm by Laverne

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.
Tuesday, April 16, 2013 at 8:07pm by Alex

Chemistry
A concentration cell consists of two Al/Al+3 electrodes. The electrolyte in compartment A is 0.05M Al(NO3)3 and in compartment B is 1.25 M Al(NO3)3. What is the voltage of the cell at 25 degrees Celcius?
Friday, July 20, 2012 at 7:13pm by Jackie

Chem
An ethylene glycol solution contains 20.9 g of ethylene glycol (C2H6O2) in 85.0 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.) freezing point C boiling point C How would I set this up? thanks
Tuesday, March 22, 2011 at 6:53pm by Lilly

Chemistry
A 1.065-g sample of an unknown substance is dissolved in 30.00 g of benzene; the freezing point of the solution is 4.25 degrees C. The compound is 50.69% C, 4.23% H, and 45.08% O by mass. Info you might need on benzene: Normal Freezing point,degrees C: 5.53 Kf, degrees m^1: 5....
Monday, February 25, 2013 at 2:19am by JJ

REDOX Balancing equations
Al+NO3^-1-->Al(OH)4^-1+NH3 I am supposed to balance this reaction and label the reduction/oxidation reactions and oxidizing/reducting agents I have my specific steps to solving this but when I get to step 2 I do not see how I can split these into 2 half reactions To me it ...
Wednesday, June 10, 2009 at 7:18pm by Aparicio

Chemistry 110, college
A solution is prepared by dissolving 56.5g of ethylene glycol in 874 g of water. Calculate the change in the boiling point and the freezing point.
Monday, April 22, 2013 at 2:05pm by Holly

Chemistry ammonia gas
Al + NaOH produces H2 gas + Al(OH)4^- which a relatively standard reaction. Al, however, is a strong reducing agent and with the NO3^- from the Ca(NO3)2, it can reduce the NO3^- to NH3. (I don't think this is a good reaction for preparing NH3--there are better ways of doing it...
Wednesday, October 29, 2008 at 12:57pm by DrBob222

Chemistry
Lake Vida is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of the water is approximately -17 C owing to the fact that it is many times as salty as typical saltwater (assume all of the salt is NaCl). ...
Sunday, October 24, 2010 at 2:06pm by Konan

Chemistry
Lake Vida is an enormous hypersaline lake that lies under 19 m of ice in the Dry Valleys region of Antartica. The freezing point of the water is approximately -17 C owing to the fact that it is many times as salty as typical saltwater (assume all of the salt is NaCl). ...
Sunday, October 24, 2010 at 2:07pm by Konan

chemistry
2Al + 3Pb(NO3)2 ==> 2Al(NO3)3 + 3Pb 1. Convert 12 g Al to moles. moles = g/molar mass 2. Using the coefficients in the balanced equation, convert mol Al to moles Al(NO3)3 3. Convert moles Al(NO3)3 to g. g = moles x molar mass.
Sunday, January 22, 2012 at 7:48pm by DrBob222

Chemistry
Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176 degrees Celsius. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram: -.904 ...
Tuesday, January 28, 2014 at 5:59pm by Sam

chemistry
calculate the freezing point of a .05500 m aqueous solution of NaNO3
Sunday, February 12, 2012 at 10:46pm by Cece

Chemistry
A dilute electrolyte solution is prepared by dissoving iron (III) chloride in water. It is found to have a freezing point of -2.10 degrees C. Calculate the molality of the solution.
Monday, October 18, 2010 at 5:39pm by Gracyn

AP Chem
mols Ca(NO3)2 = grams/molar mass. molality = mols Ca(NO3)2/kg solvent delta T = i*Kf*m i = 3 for Ca(NO3)2 Then 0C-delta T = freezing point.
Tuesday, January 22, 2013 at 10:55pm by DrBob222

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.
Wednesday, February 20, 2013 at 5:14pm by mm

chemistry
Calculate the freezing point and boiling point of 12.0g of glucose (C6H12O6) in 50.0g H20
Wednesday, February 10, 2010 at 11:50pm by Laverne

Chemistry
Delta tf is the CHANGE in freezing point. The initial freezing point was not 9C. Water freezes at 0C, and then when you add a solute, the freezing point is depressed some.
Wednesday, February 3, 2010 at 10:25am by bobpursley

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.
Saturday, February 18, 2012 at 11:03pm by Kylie

AP Chemistry
From the following: pure water solution of C12H22O11 (m=0.01) in water solution of NaCl (m=0.01) in water solution of CaCl2 (m=0.01) in water choose the one with the a) highest freezing point b) lowest freezing point c) highest boiling point d) lowest boiling point e) highest ...
Wednesday, November 24, 2010 at 12:50am by Anonymous

Chemistry
DrBob, for your first example should that be Al(NO3)2 or Ag(NO3)2? Because you have Al on the reactant side.
Wednesday, March 24, 2010 at 10:22pm by Mari

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
Monday, February 8, 2010 at 9:53pm by heather

Chemistry
Determine the freezing point depression of H20 in 1.50 m solution of C12H22011?
Tuesday, December 14, 2010 at 8:27pm by Kayla

Chemistry II
Calculate the freezing point of a 0.75 m solution of Al2(CO3)3.
Wednesday, September 16, 2009 at 2:54am by Chase

science
From the following: pure water solution of C12H22O11 (m=0.01) in water solution of NaCl (m=0.01) in water solution of CaCl2 (m=0.01) in water choose the one with the a) highest freezing point b) lowest freezing point c) highest boiling point d) lowest boiling point e) highest ...
Tuesday, October 5, 2010 at 7:10pm by Sal

chemistry
calculate the necessary amounts of solutes and solvent to make a 4l bottle of antifreeze that will have a 35 degree change in the freezing point of water. soultes are: Al2(SO4), KBr) and Mg(NO3)2.
Sunday, February 13, 2011 at 5:53pm by redgy

Chemistry
The freezing point of ethanol is -114.6 C and its Kf value is 2.00 C/m. What is the freezing point for the solution prepared by dissolving 50.0 g of glycerin (C3H8O3) in 200.0 g ethanol? I used Change in temp=Kfm kf=2.00 I calculated m to be 2.1736. I ended up the answer of -...
Wednesday, February 13, 2013 at 3:34pm by Lauren

Chemisty
A solution contains 20g of C^6H^12O^6 in 250g of water. What is the freezing-point depression of the solvent? What is the Freezing point of the solvent?
Sunday, March 7, 2010 at 7:37pm by Veronica

intro to chem
disolving sucrose, NaCl< and calcium chloried affect the boiling point of frezing point of water. Assuming that you have 0.1m solution of all these 3 compounds: a)rank then in order of decreasing freezing point. b) rank in order of increasing boiling point c)why do the ...
Wednesday, October 27, 2010 at 8:40pm by julia

Physics
The freezing point depression of a .100 m solution of NaCl solution is .34C. Calculate the percent dissociation of NaCl.( Kf for water=1.86) Please help
Thursday, August 27, 2009 at 11:34pm by Sammy

Calculus
I started by putting point A at the origin (0,0), then point B would be at (2000,50) I realized I was going to work with very large numbers, so I "scaled" my graph back by a factor of 50:1 so point A was still (0,0) but point B became (40,1) let f(x) = ax^3 + bx^2 + cx + d at...
Monday, December 3, 2007 at 10:41pm by Reiny

Chemistry
A solution is prepared by mixing 13.00 ml of .0021 M aqueous Hg2(NO3)2 with 25 ml of .015M HCL. Assme that volumes are additive. a) Will precipitation occur? b) Calculate [HG2 2+], [CL-], and [NO3] after equilibrium is established.
Thursday, April 8, 2010 at 1:32pm by Anmol

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).
Tuesday, September 8, 2009 at 8:42pm by Lindsay

Chemistry
What is the freezing point of a solution prepared by adding 264g of copper(ii) sulfate to 4 liters of water? The freezing point constant of water is 1.86C/m.
Sunday, March 9, 2014 at 12:01am by Bruce Wayne

Chemistry
Trial and error. Here is how you go about the first one. Rule 1. You must balance ONLY by changing the coefficients. You may NOT change any of the subscripts. Al + Pb(NO3)2 ----> Al(NO3)3 + Pb Look at the nitrate on the right side. There are 3 of them and 2 on the left so ...
Tuesday, February 17, 2009 at 7:47pm by DrBob222

chemistry Ap
q = mass x specific heat x (Tf - Ti). q = 50.0 g x specific heat Al x (125-25). You will need to look up the specific heat of Al metal. The units should be in Joules/gram. If the units are in J/mol, then you must change the 50.0 g Al to mols Al by dividing 50 by atomic mass Al...
Friday, February 8, 2008 at 11:41pm by drbob222

chemistry
A solution is made by dissolving 21.5 grams of glucose (C6H12O6) in 255 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 C/m?
Sunday, September 25, 2011 at 6:17pm by ryan

chemistry
which of the following would be expected to have the lowest freezing temperature? a. .1 M Ca(NO3)2 b. .1 M NaC2H3O2 c. .1 M CuSO4 d. .1 M HC2H3O2 e. .1 M C2H5OH Here is what you do Mary. delta T = Kb*i*m Kb is the same for all. m is the same for all. i is the number of ...
Saturday, April 21, 2007 at 2:10pm by mary

AP Chemistry
I don't know the Ka values but I suspect Al(NO3)3; however I looked up the Ka values and Fe is about 10^-3 and Al is about 10^-5 so Fe(NO3)3 is a sronger acid than Al(NO3)3.
Monday, March 3, 2014 at 10:47pm by DrBob222

Chemistry
A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 C/m?
Friday, January 14, 2011 at 4:24pm by Maria

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...
Monday, October 27, 2008 at 4:20pm by Joshua

Chemistry II
A solution is prepared by placing 72.8 g of magnesium chloride in 120 g of water at 22oC. a)What is the boiling point of the solution? b)What is the freezing point of the solution?
Wednesday, September 16, 2009 at 2:56am by Chase

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?
Tuesday, January 29, 2013 at 11:45am by Ya Girl

chemistry
Calculate the normal freezing point of an aqueous solution containing 30% w/w ethylene glycol. Thanks
Wednesday, October 26, 2011 at 10:00pm by el

Chemistry
The osmotic pressure of a liquid at 320 K is 145 kPa. Calculate the freezing point of the solution.
Tuesday, November 29, 2011 at 12:03am by David

chemistry
You would do well to make your post easier to read and understand. All you need is delta T = i*Kf*m i = 2 for KBr. i = 4 for Al(NO3)3 i = 2 for CH3COONa i = 2 for NaNO2 i = 3 for MgCl2 If m is constant and Kf is constant, then delta T = some constant x i so the one with the ...
Friday, March 29, 2013 at 9:39pm by DrBob222

chem
How many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (II) nitrate solution reacts with excess aluminum metal? Show all of the work needed to solve this problem. 2 Al (s) + 3 Fe(NO3)2 (aq) 3 Fe (s) + 2 Al(NO3)3 (aq)
Tuesday, January 17, 2012 at 5:10pm by bryan

General Chemistry
A student dissolved 4.00 g of Co(NO3)2 in enough water to make 100. mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275. mL of a final solution. How many grams of NO3- ion are there in the final solution? 0.0197 g 0.0394 g 0....
Tuesday, October 12, 2010 at 1:26am by Dave

chemistry
3.50 mol Al(NO3)3 reacts with 5.00 mols K2CrO4, the total number of moles of Al2(CrO4)3 and KNO3 would be? Here is the equation if it's needed. 2 Al(NO3)3(aq) + 3 K2CrO4(aq) → Al2(CrO4)3(s) + 6 KNO3(aq)
Wednesday, December 12, 2012 at 1:51am by Michelle

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
Sunday, October 10, 2010 at 9:50pm by Jorge

stoichiometry
When Ba(NO3)2 and K2CrO4 (sorry, i don't know how to do subscripts, but all the numbers should be subscripts!) react in aqueous solution, the yellow solid BaCrO4 is formed. Calculate the mass of BaCrO4 that forms when 3.50 x 10^(-3) mol of solid Ba(NO3)2 is dissolved in 265 mL...
Thursday, June 5, 2008 at 11:25pm by em

CHEMISTRY
a solution is made by diluting 175 mL of 0.238 M aluminum nitrate, Al(NO3)3, solution with water to a final vlume of 5.00x 10^2 mL.calculate the following. a. the molarity of aluminum nitrate, aluminum ion, and nitrate ion in the diluted solution B. the number of moles of ...
Tuesday, February 20, 2007 at 6:18pm by MeLi

chemistry
How many grams of iron metal do you expect to be produced when 305 grams of a 75.5 percent by mass iron(II) nitrate solution reacts with excess aluminum metal? Show all of the work needed to solve this problem. 2 Al (s) + 3 Fe(NO3)2 (aq) 3 Fe (s) + 2 Al(NO3)2 (aq) (4 points)
Wednesday, October 31, 2012 at 9:57am by Anonymous

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 ...
Wednesday, March 26, 2014 at 8:51pm by Alyssa

9th grade chem
What is the freezing point depression of an aquous solution of 10.0 g of glucose in 50.0 g H2O?
Tuesday, December 14, 2010 at 9:24am by Gabrielle

chemistry lab
calculate the necessary amounts of solutes and solvent to make a 4 liter bottle of antifreeze that will have a 35 degree change in freezing point of water. solutes are Al2(SO4)3, KBr, Mg(NO3)2
Monday, February 7, 2011 at 11:53am by shaknocka

chemistry
calculate the necessary amounts of solutes and solvent to make a 4 liter bottle of antifreeze that will have a 35 degree change in freezing point of water. solutes are Al2(SO4)3, KBr, Mg(NO3)2
Tuesday, February 8, 2011 at 9:37am by shaknocka lewis

chemistry
calculate the necessary amounts of solutes and solvent to make a 4 liter bottle of antifreeze that will have a 35 degree change in freezing point of water. solutes are Al2(SO4)3, KBr, Mg(NO3)2
Tuesday, February 8, 2011 at 9:37am by shaknocka lewis

Chemistry
start with an ionic equation Al(NO3)3 -> which will show you how many moles of nitrate ions are formed from 1 mole of Al(NO3)3. Then use proportion to find the concentration from 0.70 M.
Wednesday, September 8, 2010 at 1:35am by Dr Russ

chemisty
how many grams of sucrose must be dissolved in 1.5kg of water ot produce a solution which has a freezing point of -2.40 degrees C?
Sunday, April 14, 2013 at 4:51pm by Joan

chemistry
Camphor, C16H16O which has a freezing point of 174C, has a freezing point depression constant of 40.0C/m. Explain the usefulness and the limitation of camphor as a solvent for determination of molecular weights. For whose kind(s) of solute would camphor be especially useful?
Sunday, March 7, 2010 at 5:38am by iain

Chemistry
Consider a .900 M Al(NO3)3 solution. This solution has a nitrate ion concentration of:
Thursday, February 12, 2009 at 6:31pm by Chris

chemessty
What is the freezing point of an aqueous solution of 10.0 g of glucose (C6H12O6) in 50.0g H2O? (kf=-1.86 C/m)
Wednesday, March 16, 2011 at 5:19pm by bill

chem
I'm stuck on this one aswell... 50.0 ml of a 0.0500 M solution of lead (II) nitrate is mixed with 40.0 ml of a 0.200 M solution of sodium iodate at 25C. Calculate the Pb2+ and IO3- concentrations when the mixture comes to equilibrium. At this temperature the Ksp for lead (II...
Wednesday, May 2, 2007 at 5:41pm by Ilene

Chemistry
1) Benzene freezes at 5.45 degrees celsius. The Kf for benzene is -5.07C/m. What would be the freezing point of a 0.210m solution of octane in benzene? I am not sure how to start this. I know the equation for freezing point is Kfp * m solute.
Sunday, February 12, 2012 at 5:38pm by Hannah

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
Saturday, November 5, 2011 at 9:49am by Monique

Chemistry
A solution was made by dissolving 62.07 grams of a compound in 500g of water. The compound was not ionic. The freezing point of the solution was measured and found to be -1.86 degrees celsius. Using the Kf value in your textbook, the molar mass of this conpound can be ...
Sunday, February 12, 2012 at 8:17pm by Hannah

Chemistry
consider a .90 M Al(NO3)3 solution. what is the molar concentration of nitrate ion in this solution?
Tuesday, July 15, 2008 at 7:48pm by shanta

chemistry
A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 C/m? Show all of the work needed to solve this problem.
Friday, March 29, 2013 at 7:27pm by kat

chemistry
A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 C/m? Show all of the work needed to solve this problem.
Saturday, April 6, 2013 at 8:46am by MadiB PLEASE HELP :(

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