# How do you balance #Mn + HI -> H_2 + MnI_3#?

##### 1 Answer

#### Answer:

You can balance it by inspection.

#### Explanation:

The procedure I usually use is:

- Start with the most complicated formula.
- Balance all atoms
**other than**#"H"# and#"O"# . - Balance
#"O"# . - Balance
#"H"# . - If necessary, multiply by an integer to remove fractions.
- Check that all atoms are balanced.

Your unbalanced equation is

**Step 1. Start with the most complicated formula.**

Put a 1 in front of

**Step 2. Balance #"Mn"#.**

We have fixed

**Step 3. Balance #"I"#.**

We have fixed

Put a 3 before

**Step 4. Balance #"H"#.**

We have fixed

We have

All atoms should now between balanced, but we have a fraction in front of

**Step 5. Multiply all coefficients by 2 to remove fractions.**

**Step 6. Check that all atoms are balanced.**

The balanced equation is