Question

calculate the mass of sodium sulphate required to prepare its [mass %] solution in 100 g of water.

Answer 1

Answer:

Let the mass of sodium sulphate required be = x g 

The mass of solution would be = (x +100) g  x g of solute in (x + 100) g of solution

  20% = ×/x+100 x100 

20 x + 2000= 100 x 

80 x = 2000 

x = 2000/ 80  = 25

you have not given here per centage so I'm taking it 20

Answer 2

Answer:

25g Ans.

Explanation:

Mass of the solution = mass of solute + mass of solvent

Given that the mass percent of sodium sulphate solution is 20%.

Let the mass of sodium sulphate required be = x g  

The mass of solution would be = (x + 100) g

x g of solute in (x + 100) g of solution  

20% = ×/x + 100 x 100

20x + 2000= 100x

80x = 2000

x = 2000/ 80

= 25g Ans.

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