Determine the amount of potassium chloride in each solution.(a) 19.7 g of a solution

Step 1 of 2

Here, we are going to calculate the amount of KCl in each solution by using the formula of mass percent.

Mass percent is defined as

\(\text { Mass percent }(\%)=\frac{\text { Mass of the solute }}{\text { Mass of the solution }}\)

(a) 19.7 g of a solution containing 1.08% KCl by mass

Given that,

Mass percent of solute = 1.08%

Mass of the solution = 19.7 g

From the equation (1)

\(\text { Mass percent }(\%)=\frac{\text { Mass of the solute }}{\text { Mass of the solution }}\)

\(\begin{aligned}\text{ Mass of the solute }&=\text{ Mass percent }\mathrm{\times}\text{ mass of the solution }\\ &=1.08/100\times19.7\mathrm{\ g}\\ &=0.2127\mathrm{\ g}\end{aligned}\)

Thus, the amount of potassium chloride in each solution is 0.2127 g