Question

calculate the mass of sodium sulpate to prepare its 20per cent solution in 100gram ​

Answer 1

Answer:

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Explanation:

Given that the mass percent of sodium sulphate solution is 20%. Let the mass of sodium sulphate which is required to prepare this solution be x grams. Given that the mass of water is 100 g. Thus, 25g of sodium sulphate is required.

Answer 2

we have given weight / weight % i.e 20 % in 100 gm

let the mass of sodium sulphate be X gm

then acc.to formula :-

mass % = given weight of solute / total weight of solution X 100

20 = X /( X + 100) X 100 ( here, water is 100 gm )

20 = 100X /X+ 100

20X + 2000 = 100X

2000= 80X

X = 2000/80

X = 200/8

X = 25 gm

hope u understood !