Calculate the mass of sodium sulphate required to prepare its 20% solution in 100g of water?
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5
Answer:
The mass of sodium sulphate required to prepare its 20% solution in 100g of water is 25 g
Explanation:
Given
percentage of solution = 20 %
mass of water = 100 g
mass of sodium sulphate = ??
Solution
let us suppose the mass of sodium sulphate is "x"
the mass of solution will be = (x + 100g)
to find the x g of solute in x + 100g of solution
20 % = (x / x + 100g ) 100
by solving we get
20x + 2000 = 100x
2000 = 80x
x = 25 g
The mass of sodium sulphate required to prepare its 20% solution in 100g of water is 25 g
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