An impure sample contains 1.09 g of impurities and 5.07 g of benzoic acid.  The impure sample is dissolved in water, then heated.  The solution is then cooled.  How many grams of benzoic acid will recrystallize when the solution has cooled? The solubilities of the impurity and benzoic acid in hot water are given below: Compound Cold Water solubility Hot Water Solubility Benzoic acid 0.42 g per 100 mL of water 5.79 g per 100 mL of water Impurity 0.61 g per 100 mL of water 4.62 g per 100 mL of water

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