# How would you balance the following reactions using the oxidation number change method?

##
#KClO_3 -> KCl + O_2#

#SbCl_5 + KI -> SbCl_3 + KCl + I_2#

##### 2 Answers

#### Explanation:

In the given equation,

And for

And we takes

Charge is balanced and mass is balanced, so the equation is reasonable.

Here's how to balance the second equation by the oxidation number method.

#### Explanation:

We start with the unbalanced equation:

**Step 1. Identify the atoms that change oxidation number**

The atoms that change oxidation number are:

**Step 2. Equalize the changes in oxidation number**

We need 2 atoms of

This gives us total changes of +2 and -2.

**Step 3. Insert coefficients to get these numbers**

**Step 4. Balance #"Cl"#**

We have fixed 5

Every formula now has a coefficient. The equation should be balanced.

**Step 5. Check that all atoms are balanced.**

The balanced equation is