What is the oxidation number of S in H2SO4.

## What is oxidation number?

The terms Oxidation number is defined as the charge which an atoms appear when electrons are shown. it may be positive or may be negative.

for example;

Ammonia – NH3

Covalency is – (3)

whereas

Oxidation number is – (-3)

### What is the Oxidation Number of S in H2SO4?

**(a) Oxidation number of s in H2SO4**

let the oxidation number of s be x..

Now, sum of oxidation number of verious atoms in H2SO4 sulphuric acid. It is easy to find out with the following methods.

= 2 × (+1) + x + 4 × (-2)

= 2 + x – 8

= x – 6

Where, H = (+1) & O = (-2)

This sum must be zero according to rule 6.

Hence, x – 6 = O

x = 6

**What is the Oxidation number of S in H2S2O7?**

Let the oxidation number of S be x.

the sum of oxidation number of verious atoms in H2S2O7

= 2 × (+1) + 2x + 7 × (-2)

= 2 + 2x – 14 = 2x – 12

if you put 2x – 12 = 0 as above

We get x = +6

therefore, the oxidation number of s in H2S2O7 is +6.

### What is the oxidation number of S in Na2S2O3?

= 2 × (+1) + 2x + 3 × (-2)

= 2 + 2x – 6

= 2x – 4

put the value of 2x – 4 = 0

then then the value of x = +2

therefore, the oxidation number of S in Na2S2O3 is +2.

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