Question

A solution is obtained by mixing 200 g of 30% and 300 g of 20% solution by weight. What is the percentage of solute in the final solution?

Answer 1

Answer: 24

Solute in 200 g of 30% solution $=60$ g
Solute in 300 g of 20% solution $=60$ g
total grams of solute $=120$ g
total grams of solution $=200+300=500$ g
% of solute in the final solution $=\frac{\text{Wt. of solute}}{\text{Wt. of solution}}\times 100$
% of solute in the final solution $=\frac{120}{500}\times 100=24\%$