Cocaine (C17H2O4N) arrives in the USA either as the pure compound or as the hydrochloride salt  (C17H2104NHCL) at 25°C the salt is very soluble in water (2.50kg/L) but pure cocaine is much less so(1.70g/L) a. When a 25 mL aqueous solution that contains 62.50 g of the salt is treated with NaOH the salt is converted to pure cocaine. How much water in litres is needed additionally to dissolve the formed pure cocaine  C17H21O4NHCL + NaOH = C17H2104N + H20 + NaCL

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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.