A student was asked to prepare 250 ml of 20 % w/w aqueous solution of common salt. He added 20 g of common salt in sufficient amount of water to obtain therequired amount of solution. Calculate the concentration of solution he prepared.Also find the exact amount of salt and water to be added to prepare the solution ofgiven concentration.

A student was asked to prepare 250 ml of 20 % w/w aqueous solution of

1.	A student was asked to prepare 250 ml of 20 % w/w aqueous solution of common salt. He added 20 g of common salt in sufficient amount of water to obtain therequired amount of solution. Calculate the concentration of solution he prepared.Also find the exact amount of salt and water to be added to prepare the solution ofgiven concentration.
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