Question

How many grams of solution must be added to 10.0 g of KCI in order to prepare a12.0% (m/m) KCl solution?

Answer 1

Mass percent concentration (% m/m) is given as the mass of the solute per 100 units mass of solution.

`\begin{gathered} \%mm=\frac{mass\text{ }solute}{mass\text{ }solution}*100 \\ 12\%=(10.0g)/(xg)*100 \\ 0.12=\frac{10.0\text{ }g}{x\text{ }g} \\ x=\frac{10.0\text{ }g}{0.12} \\ x=83.3g \end{gathered}`

Answer: 83.3g of solution must be added to 10g of KCl in order to prepare 12.0% (m/m) KCl solution.