Calculate the percentage composition in terms of mass of a
solution obtained by mixing 300 g of a 25% and 400 g of a 40% solution by mass.

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Solution

300g of 25% solution contains solute = (300 x 25) / 100 = 75g
& 400g of 40% solution contains solute = (400 x 40) / 100 = 160g
Total solute = 75 + 160 = 235g
As given in the question, total solution =300 + 400 = 700g
Percentage of solute in the final solution = (235 x100) / 700 = 33.5%
Percentage of water in the final solution = 100 - 33.5 = 65.5%

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Calculate the percentage composition in terms of mass of asolution obtained by mixing 300 g of a 25% and 400 g of a 40% solution by mass.

Calculate the percentage composition in terms of mass of a
solution obtained by mixing 300 g of a 25% and 400 g of a 40% solution by mass.