Question

Calculate the mass of sodium sulphate required to prepare its 20% (mass per cent) solution in 100 g of water​

Answer 1

Answer:

x=25 gm

Step-by-step explanation:

Let the mass of sodium sulphate required  =x gm

The mass of solution =(x+100) gm

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

% of Na2SO4 in the slotion

=100*x/(x+100)=20

100x=20x+2000

80x=2000

x=2000/80=25 gm

Answer 2

Answer:

$x \: = 25g$

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