Chemistry - Concentration Terms Question with Solution | TestHub

Mass of solution $= 200 + 500 = 700 \mathrm{g}$

$25\%$ of sugar solution means $100\mathrm{g}$ solution contain $25\mathrm{g}$ sugar

$40\%$ of sugar solution means $100\mathrm{g}$ solution contain $40\mathrm{g}$ sugar

Mass of sugar $= 0.25 \times 200 + 0.40 \times 500$

$= 50 + 200 = 250 \mathrm{g}$

Mass $\%$ of resulting solution

$=\frac{250}{700}\times 100=36\%$