# Question fa590

Mar 28, 2017

$\text{0.927 g KCl}$

#### Explanation:

A solution's percent concentration by mass is supposed to let you know how many grams of solute are present for every $\text{100 g}$ of solution.

In this case, a color(blue)(1.67)color(darkorange)(%)# by mass potassium chloride solution will contain $\textcolor{b l u e}{\text{1.67 g}}$ of potassium chloride, the solute, for every $\textcolor{\mathrm{da} r k \mathmr{and} a n \ge}{\text{100 g}}$ of solution.

Since solutions are homogeneous mixtures, i.e. the have the same composition throughout, you can use the percent concentration by mass as a conversion factor to determine the mass of solute present in your sample

$55.491 \textcolor{red}{\cancel{\textcolor{b l a c k}{\text{g solution"))) * "1.67 g KCl"/(100color(red)(cancel(color(black)("g solution")))) = color(darkgreen)(ul(color(black)("0.927 g KCl}}}}$

The answer is rounded to three sig figs, the number of sig figs you have for the solution's percent concentration.