What is the oxidation number of Mn in K2MnO4?
Correct answer: C. +6
- A. +2
- B. +4
- C. +6
- D. +7
Explanation
The oxidation number of Mn in K2MnO4 can be calculated as follows; 2(K) + Mn + 4(O) = 0 As we know that oxidation nimber of K is +1 and that of O is -2; 2(+1) + Mn +4(-2) =0 +2 + Mn -8 =0 Mn - 6 = 0 Mn = +6. So, the oxidation number of Mn is +6. Hence, option C is correct.
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Electrochemistry describes electron transfer through oxidation and reduction, identifies oxidizing and reducing agents, and applies oxidation numbers to balance redox equations. It also covers electrode potential and the standard hydrogen electrode, which provides the reference for comparing the reduction tendencies of other electrodes.
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