Problem

In a laboratory experiment, a 15.0-mL sample of KCl solution is poured into an evaporating...

In a laboratory experiment, a 15.0-mL sample of KCl solution is poured into an evaporating dish with a mass of 24.10 g. The combined mass of the evaporating dish and KCl solution is 41.50 g. After heating, the evaporating dish and dry KCl have a combined mass of 28.28 g.

a. What is the mass percent (m/m) of the KCl solution?

b. What is the molarity ( M) of the KCl solution?

c. If water is added to 10.0 mL of the initial KCl solution to give a final volume of 60.0 mL, what is the molarity of the diluted KCl solution?

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