300 g of 25% solution and 400 g of 40% solu | vedclass

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Question

(A) $25\%$ solution means $25 \ g$ of solute in $100 \ g$ of solution.$40\%$ solution means $40 \ g$ of solute in $100 \ g$ of solution.Mass of solute

Vedclass · Accepted Answer

$33.57$

Vedclass · Answer

(A) $25\%$ solution means $25 \ g$ of solute in $100 \ g$ of solution.$40\%$ solution means $40 \ g$ of solute in $100 \ g$ of solution.Mass of solute in $300 \ g$ solution $= \frac{25 	imes 300}{100} = 75 \ g$.Mass of solute in $400 \ g$ solution $= \frac{40 	imes 400}{100} = 160 \ g$.Total mass of solute $= 75 + 160 = 235 \ g$.Total mass of solution $= 300 + 400 = 700 \ g$.Percentage by weight $= \frac{235}{700} 	imes 100 = 33.57\%$.

$300 \ g$ of $25\%$ solution and $400 \ g$ of $40\%$ solution are mixed by weight. Calculate the percentage of the solute by weight in the final mixture. (in $\%$)

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