Calculate the percentage composition of the following solutions.
a) 15mL of vinegar in 315mL of water.
b) 25g of sodium sulphate in 325mL of its aqueous solution
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Answer:a) % composition= mass of solute÷mass of solution ×100
= 15÷315×100
=4.7%
b) %composition=25÷325×100
=7.6%
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