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lbvjy [14]
3 years ago
6

6. The oxidation number of Mn in KMnO4 is A) +8. B) +7. C) +5. D) -7. E) -8.

Chemistry
2 answers:
QveST [7]3 years ago
7 0

The oxidation number of Mn in KMnO_4  is +7.

Explanation:

In a compound  the sum of the oxidation states of all the atoms will be to equal the total charge on the ions.

KMnO_4 is neutral hence its total charge is zero

Oxidation number of  potassium+ Oxidation number of Manganese+Oxidation number of  Oxygen=0

We Know that

Oxidation number of  potassium= +1

Oxidation number of  Oxygen=  -2

 Substituting the values,

(+1)+ Oxidation number of  Manganese+ 4(-2)=0

(+1)+ Oxidation number of  Manganese+ (-8)=0

(-7)+ Oxidation number of  Manganese=0

Oxidation number of  Manganese= +7

Pani-rosa [81]3 years ago
6 0

Answer:

kmno4 = 0\\ k(potassium) =  + 1  \\ mn(manganese) = x\\ o(oxygen) =  - 2 \\  \\ (+ 1) + x + ( - 2)4 = 0 \\  1 + x  - 8 = 0 \\ x = +  8 - 1 \\ x =  + 7

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