Question

Assign oxidation numbers to all the elements in each of the following compounds:

HSeO4^-

H2PO3^-

SO4^2-

BaSO3

AlPO4

NO3^-

Ni2O3

ClO3^-

Answer 1

1.

HSeO4^-   

H	+1
Se	+6
O	-2

2.

H2PO3^-

H	+1
P	+3
O	-2

3.

SO4^2-

S	+6
O	-2

4.

BaSO3

Ba	+2
S	+4
O	-2

5.

AlPO4

Al	+3
P	+5
O	-2

6.

NO3^-

N	+5
O	-2

7.

Ni2O3

Ni	+3
O	-2

8.

ClO3^-

Cl	+5
O	-2

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