Question

What mass of salt must be

added to 500 gm of water to

make 20% salt solution

[ Ans. 125 gm ]
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Answer 1

EXPLANATION:-

Mass% of salt solution=20%

Mass of the solvent=500g

Mass of the solute be 'x'grams

Using the formula,

Mass%=Mass of solute/Mass of solution ×100

20= x/x+500 ×100

20(x+500)g=100x

20x+10000=100x

100x-20x=10000

80x=10000

x=10000/80

x=125grams

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