a) An experiment requires 100 g of a 19.7% solution of NaOH. How many grams each of NaOH and H₂O do we need to mix the solution? b) How much CrCl3 6H₂O is needed to prepare 1 L solution containing 20 mg Cr³+/ml? c) What is the percent composition Na₂SO4 (density 1.03) if it contains 0.001 g salt per mL of solution?

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.