Question

20g of salt is dissolved in water to prepare 20% aqueous solution.calculate the amount of salt added to this solution to make the final concentration 30%.

Answer 1

Answer:

Calculate the amount of water by which 50 mL of a solution having concentration `20%` w/v and density 2 g/mL should be diluted to obtain a solution of concentration `7.5%` w/v:

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