Question 12.2: A sample of 0.892 g of potassium chloride (KCl) is dissolved...

A sample of 0.892 g of potassium chloride (KCl) is dissolved in 54.6 g of water. What is the percent by mass of KCl in the solution?

Strategy We are given the mass of a solute dissolved in a certain amount of solvent. Therefore, we can calculate the mass percent of KCl using Equation (12.1).

$\text { percent by mass }=\frac{\text { mass of solute }}{\text { mass of soln }} \times 100 \%$ (12.1)

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