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.

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Solution

Total amount of solute present in the mixture is given by,

= 75 + 160

= 235 g

Total amount of solution = 300 + 400 = 700 g

Therefore, mass percentage (w/w) of the solute in the resulting solution,

= 33.57%

And, mass percentage (w/w) of the solvent in the resulting solution,

= (100 − 33.57)%

= 66.43%

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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.

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Q. The percentage (by mass) concentration of a solution obtained by mixing

300

g of a

25

% (solution

I

) and

400

g of a

40

% (solution

I I

) by mass is (as the nearest integer):

1st Solution-300g of 25% w/w

2nd Solution-400g of 40% w/w

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(w/w) 500 g aqueous solution of the area with

25 %

(w/w) 400g aqueous solution of it?

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