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Question

Question 42
Calculate the mass of sodium sulphate required to prepare its 20% (mass percent) solution in 100 g of water?


Solution

In the given question, mass% of sodium sulphate solution = 20%
Mass of the solvent = 100 g
Let the mass of solute (sodium sulphate) = x g
20=xx+100×100
80x=2000
x=25
Mass of sodium sulphate = 25 g 
 

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