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Calculate the percentage of potassium oxide in an impure sample of potassium carbonate from the following data: Weight of sample = 1.00 gram; HCl sol. used = 55.90 cc.; NaOH sol. used = 0.42 cc.; 1 cc. NaOH sol. = 0.008473 gram of KHC O .H C O .2H O; 2 cc. HCl sol. = 5 cc. NaOH sol. !Answer!: 65.68%. NaOH solution = 1.190 cc. HCl solution. !Answer!: 97.97%.
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