Concentration Practice Worksheet
1)
If I make a solution by adding water to 75 mL of ethanol until the total
volume of the solution is 375 mL, what’s the percent by volume of ethanol
in the solution?
2)
If I add 1.65 L of water to 112 grams of sodium acetate…
a)
What is the molality of NaC2H3O2 in this solution?
b)
What is the percent by mass of sodium acetate in this solution?
c)
What is the mole fraction of water in this solution?
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Concentration Practice Worksheet Answers
1)
If I make a solution by adding water to 75 mL of ethanol until the total
volume of the solution is 375 mL, what’s the percent by volume of ethanol
in the solution?
20%
2)
If I add 1.65 L of water to 112 grams of sodium acetate…
a)
What is the molality of NaC2H3O2 in this solution?
0.82 m
b)
What is the percent by mass of sodium acetate in this solution?
6.36%
c)
What is the mole fraction of water in this solution?
0.985
For chemistry help, visit www.chemfiesta.com
© 2007 Cavalcade Publishing, All Rights Reserved