M is the molecular mass of KMnO4. What is the equivalent mass of KMnO4 when it is converted to K2MnO4?

Expert Answers
nessus eNotes educator| Certified Educator

M(KMnO4) = 39.10 + 54.94 + (4 x 16.00 ) = 158.04

M(K2MnO4) = (2 x 39.10) + 54.94 + (4 x 16.00) = 197.14

hkj1385 | Student

KMnO4 has Mn with a charge of +7

K2MnO4 has Mn with a charge of +6

Thus, Conversion of KMnO4 to K2MnO4 has a overall change of 1 

Thus, the equivalent mass of KMnO4 = Molecular mass of KMnO4/change in the O.N = M/1 = M

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