Measures of Concentration: Molarity

Question 1

A solution is formed by mixing 0.400 mol NaOH into 0.800 kg water. What is the best set up to find molality?

Revolt · Accepted Answer

B: m = mol solute/kg solvent

Question 2

A sample of seawater with a volume of 0.25 L contains 8.75 g salt. What is the salt concentration in g/L?

Revolt · Accepted Answer

C: 35 g/L

Question 3

A sample of a glucose solution has a volume of 0.500 L. The concentration of glucose in the solution is 0.100 g/L. How many grams of glucose are present in the sample?

Revolt · Accepted Answer

A: 0.0500 g

Question 4

A solution with a concentration of 0.0640 g/L CsOH contains 1.260 g CsOH. What is the volume of the solution?

Revolt · Accepted Answer

C: 19.7 L

Question 5

What is the percent by mass of a solution that contains 25 g KNO3 in 400.0 g H2O?

Revolt · Accepted Answer

C: 5.9%

Question 6

A water sample has a mass of 25.0 g. It contains 1.56 × 10–5 g NaCl. What is the best set up to find ppm?

Revolt · Accepted Answer

B: ppm = mass solute/mass solution × 106

Question 7

A solution of NaCl has a concentration of 1.50 M. The density of the solution is 1.06 g/mL. What is the concentration of the solution in percent by mass? Which expression shows the correct dimensional analysis required to solve this problem?

Revolt · Accepted Answer

B:

Measures of Concentration: Molarity Answers

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