Homework Help: chemisrty

Posted by lyan on Monday, January 16, 2012 at 4:43pm.

Q4) Suppose you prepare 950 mL of a solution by dissolving 100 grams of NaCl in 900 mL of water. Assuming the density of pure water to be 1 g/mL, answer the following questions with regards to this solution:

a) What is the mass percent of water in this solution?
b) What is molarity of NaCl solution?
c) What is the mole fraction of NaCl in the solution?

chemisrty - DrBob222, Monday, January 16, 2012 at 5:02pm
a. mass % H2O = (grams H2O/grams soln)*100 = (100g H2O/1000g)*100 = ?

b. M = moles NaCl/L soln = moles NaCl/0.950 = ?
moles NaCl = grams NaCl/molar mass

c. mols NaCl you have.
mols H2O = grams H2O/molar mass
total moles = ?

XNaCl = moles NaCl/total moles.

Answer this Question

Related Questions

science - Q4.you will be asked to prepare 25.0 mL of a 0.019 M solution of ...
Chemistry - What is the molarity of a solution of Mg(OH)2 if the solution ...
Chem3 - A solution is prepared by dissolving 22.8 mL of methanol (d = 0.782 g/mL...
science-chem - first, thanks so much Bob for helping me!!!! Q4.you will be asked...
chemistry - A potassium nitrate solution is prepared by dissolving 2.3 g of KNO3...
chemistry - (3 pts) The stockroom prepared a solution by dissolving 0.2300 g of ...
chemistry - The molarity of a solution prepared by dissolving 15.0 grams of NaCl...
chemistry - How many mL of a 0.90% (m/v) NaCl stock solution will you need to to...
science - The solubility of sodium chloride is 36.0 g/100. ml of water, and the ...
Chemistry - In a lab we are doing, we need to find the theoreical amount of NaCl...

For Further Reading

First Name:
School Subject:
Answer: