# college chem

. Jack Daniels Tennessee whiskey is 40.00% ethanol by volume. However, % alcohol by mass is quite different from % by volume. The molality of ethanol in an aqueous solution that is 40.00 % ethanol by volume is 10.88 molal.
A) Find the % ethanol by MASS, based on the molality. The MM of ethanol, C2H5OH is 46 g.
B. Find the mole fraction of alcohol in the 10.88 molal ethanol solution.
C. The solution has a density of 0.948 g/mL. Find the molarity of the solution.

1. 👍 0
2. 👎 0
3. 👁 770
1. For A.
Assume you have enough solution to contain 10.88 moles ethanol. Therefore, you will have 1 kg water (1,000 g).
10.88 moles x (46 g/mol) = 500.48 grams ethanol.
Total mass of the solution is 1000 g + 500.48 = 1500.48 grams.
% ethanol = (mass ethanol/mass soln)*100
% ethanol = (500.48/1500.48)*100 = 33.35%.

For B, take enough sample to have 10.88 moles ethanol. That will give you 1,000 g H2O. Convert g H2O to moles and calculate mole fraction of each.

For C. I would use the mass percent and the density to calculate molarity.

Post your work if you get stuck.

1. 👍 0
2. 👎 0

## Similar Questions

1. ### chemistry

If the density of a certain alcohol is 0.785 g/mL, what volume of the alcohol would have a mass of 75.0g?

2. ### Social Studies

2. What was Hamilton’s rationale for placing a tax on whiskey? He planned to use the tax to reduce national debt He wanted to impose a penalty on farmers for producing too much Whiskey He wanted to halt the export of whiskey He

3. ### AP Chemistry

A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.

4. ### chemistry

A solution of ethanol, C2H5OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the percent-by-volume concentration of ethanol?

1. ### Chemistry

A person’s blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. The balance is 16H+ (aq) + 2Cr2O72- (aq) + C2H5OH (aq) 4Cr3+ (aq) + 2CO2 (g) + 11H2O (l) If

2. ### Chemistry

The density of an aqueous solution containing 10% of ethanol (C2H5OH) by mass is 0.984 g/ml. A) Calculate the molality of this solution. B) Calculate its molarity. C) What volume of the solution would contain 0.125 mol of ethanol.

3. ### Chem

A bottle of win contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is .79 g/mL. Calculate the concentration of ethanol in wine as mass percent and molality. I calculated molality as 2.4 m/kg, but I'm stumped on the

4. ### Chemistry

Listerine mouthwash has 21.6% ethyl alcohol by volume. What mass of ethanol is contained in 20.0 mL of mouthwash ?! ( the density of ethanol is 0.789 g/mL.) how would yu do this problem ?!?!

1. ### 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.

2. ### Chemistry: Dr. Bob, can you check my work?

In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is

3. ### chemistry

What is the percent by mass of 3.55 g NaCl dissolved in 88 g H2O? 2. A solution is made by adding 1.23 moles of KCl to 1000.0 g of water. What is the % by mass of KCl in this solution? 3. If you have 100.0 mL of a 25% aqueous

4. ### chemistry

Please help =) 59. Ethanol, C2H5OH, is responsible for the effects of intoxication felt after drinking alcoholic beverages. When ethanol burns in oxygen, carbon dioxide and water produced. (a) Write a balanced equation for the