Question

Cr2 o7²‐ assign oxidation number to the underlined elements in the below compounds

Answer 1

Explanation:

a) Let x be the oxidation number of Mn in potassium permanganate KMnO

4

.

Since, the overall charge on the complex is 0, the sum of oxidation states of all elements in it should be equal to 0.

+1+x+4(−2)=0

x=+7

b) Let x be the oxidation number of Cr in chromyl chloride CrO

2

Cl

2

.

x+2(−2)+2(−1)=0

x=+6

c) Let x be the oxidation number of I in nitric acid NaIO

3

.

1+x+3(−2)=0

x=+5