# 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

#### Answer:

#### Explanation:

In the given equation,

And for

And we takes

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

#### Answer:

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