Question

Calculate the percentage concentration by mass of a solution prepared by dissolving 2.32 g of calcium chloride in 81.0 g of water. 

 

Answer 1

$\% \textsf{mass concentration} =\dfrac{\textsf{mass of solute}}{\textsf{mass of solution}}×100\%= \dfrac{2.32 \textsf{g }}{81.0 \textsf{g }}×100\%= 0.2×100\% = 20\%$