1.

a 100 litres of acid and water contains 20 litres of acid. how must be added to make the solution 16 percent acidic

Answer»

As there is 20 litres of acid, which is fixed. To make a 16 percent acidic solution we add water and now the quantity becomes say x. So 16 % of x = 20..16 * x = 20X = 125.Therefore 25 litres of water is to be added



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