Question

Assign oxidation number to the underlined element in the following species
I HAVE DENOTED THE UNDERLINED ELEMENT WITH THIS SYMBOL ( )
a) H4P2O7
b) Na(B)H4

Answer 1

Answer:

Let x be the oxidation number of O in CaO

2

.

2+2x=0

x=−1

Hence, the oxidation number oxygen in CaO

2

is -1