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