1.

Calculate the mass of sulphuric acid required to prepare its 20% (mass percent) solution in 100 g of water ?

Answer»

Solution :Mass percent =`("Mass of solute")/("Mass of water")xx 100`
`20 = (x)/((x + 100)) xx 100`
`20X + 2000 = 100x`
or `80X = 2000 or x = (2000)/(80) = 25 G`


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