IIT JEE , AIEEE Forum - Chemistry , Physical Chemistry

Himanshu346

A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass.Calculate the mass % of the resulting solution?

Answer= 32% and 68%

ashgirl

amt of solute in 25% of 300g solution - 25% of 300 = 75g

amt of solute in 40% of 400g solution- 40% of 400 = 160g

total amt of solute = 75 + 160 = 235g

total amt of solution = 300 +400 = 700

percentage of solute in this solution = = 33.5%

percentage of water is 100 - 33.5 = 66.5%

nunoxic

A solution is obtained by mixing 300 g of 25% solution and 400 g of 40% solution by mass.Calculate the mass % of the resulting solution?

25% means 25 gms in 100 gms of soln
thus we have 75 gms
40% means 40 gms in 100 gms of soln
hence we have 160 gms

Total Mass of solute in the soltuion is 235 gms
the total mass of soltuion is 700 gms
thus mass percentage is 33.5

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