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The oxidation states of transition metal atoms in K2Cr2O7 , KMnO4 and K2FeO4 , respectively, are x, y and z. The sum of x, y and z is ......

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The oxidation states of transition metal atoms in K2Cr2O7 , KMnO4 and K2FeO4 , respectively, are x, y and z. The sum of x, y and z is ......

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K2Cr2O7

2 (+1) + 2X + 7(–2) = 0 

X = 6 

Transition metal chromium is present in +6 oxidation state. In KMnO4 transition metal molar mass is present in +7 oxidation state

In K2FeO4 transion metal Fe is present in +6 oxidation state

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