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Potassium chromate is isomorphous to potassium sulphate (K_(2)SO_(4)) and is found to contain 26.78% chromium. Calculate the atomic mass of chromium (K=39.10) |
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Answer» Solution :Since, the formula of potassium SULPHATE is `K_(2)SO_(4)`, so the formula of potassium chromate should be `K_(2)CrO_(4)` as it is isomorphous to `K_(2)SO_(4)`. If the atomic mass of chromium is A, then formula mass of potassium chromate should be `=2xx39.1+A+64=(142.2+A)` % of chromium `=(A)/((142.2+A))xx100` So, `(100A)/((142.2+A))=26.78` `100A=26.78(142.2+A)` or `A=(26.78xx142.2)/(73.22)=52.00` |
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