Question

A solution is prepared by dissolving a certain amount of solute in 500 g of water. The percentage by mass of a solute in solution is 2.38. Calculate the mass of solute.

• A. 11.27 g
• B. 11.45 g
• C. 14.23 g
• D. 15.42 g

Answer 1

The correct option is A 11.27 g

Let the weight of the solute be x

$\begin{array}{c}2.38=\frac{x\times 100}{x+500}\\ 2.38x+1190=100x\\ x=\frac{1100}{97.62}=11.27\\ \text{mass of solute}=11.27g\end{array}$

Hence option A is correct.