A 50-g sample of impure KClO3 (solubility = 7.1 g per 100 g H2O at 20 degrees C) is contaminated with 10 percent of KCl (solubility = 25.5 g per 100 g of H2O at 20 degrees C). Calculate the minimum quantity of 20 degrees C water needed to dissolve all the KCl from the sample. How much KClO3 will be after this treatment?

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