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QUESTION 2.7

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


Solution

Mass of solute in I solution =25100×300g=75g

Mass of solute in II solution =40100×400=160g

After mixing both solutions,

Total mass of solute = (75 + 160) g = 235 g

Total mass of solution = (300 + 400) g = 700 g

Mass % of solute in final solution =(235g)(700g)×100=33.57% 

Mass % solvent in final solution =10033.57=66.43%


Chemistry
NCERT Textbook
Standard XII

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