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2 MnO 4 - + bI - + cH 2 O → xI 2 + yMnO 2 + zOH - If the above equation is balanced with integer coefficients, the value of z is ________.

Correct answer

0

Step-by-step solution

Reduction Half reaction 2 MnO 4 - → 2 MnO 2 2 MnO 4 - + 4 H 2 O + 6 e - → 2 MnO 2 + 8 OH - Oxidation Half reaction 2 I - → I 2 + 2 e - 6 I - → 3 I 2 + 6 e - Adding oxidation half and reduction half, net reaction is 2 MnO 4 - + 6 I - + 4 H 2 O → 3 I 2 + 2 MnO 2 + 8 OH - ⇒ z = 8 ⇒ Ans 8

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