KMnO4 is isomorphous with potassium perchlorate KClO4. If KCIO4 contains 28.16% of potassium, calculate the at. wt. of potassium (At. wt. Mn = 55, Cl=35.5)

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answer is 39.

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Detailed Solution

Mol. wt. of KClO4=m+35.5+(4×16)=m+99.5;m =At.wt. of K. Hence,28.26 = m/(m + 99.5) x 100; m = 39

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