Chemistry: Matter and Change

Section 2: Concentration of Solutions

Self Check Quizzes

1
What is the percent by mass of NaCl in a solution that contains 17.5 g NaCl per 500.0 g of water?

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A)3.38%
B)3.50%
C)3.61%
D)14.80%
2
Molarity is defined as the ____________.
A)mass of solute per mass of solution
B)volume of solute per volume of solution
C)moles of solute per liter of solution
D)moles of solute per kilograms of solvent
3
What is the mole fraction of ethanol (C2H5OH) in a solution of 47.5 g of ethanol in 850 g of water?
A)0.021
B)0.18
C)0.032
D)0.98
4
What is the molality of HCl in an aqueous solution in which the mole fraction of HCl is 0.220?

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A)15m
B)282m
C)30.9m
D)15.7m
5
What is the molarity of a 50.0 ml solution containing 10.0 grams of table sugar (C12H22O11)?

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A)0.000584 M
B)2.00 M
C)0.584 M
D)200 M
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