# Question #dc373

##### 1 Answer

To get the experimental molar ratio, you divide the moles of each reactant that you actually used in the experiment by each other.

#### Explanation:

**EXAMPLE 1**

Consider the reaction:

What is the experimental molar ratio of

**Solution**

**Step 1**: Convert all masses into moles.

**Step 2**: Calculate the molar ratios

To calculate the molar ratios, you put the moles of one reactant over the moles of the other reactant.

This gives you a molar ratio of

Usually, you divide each number in the fraction by the smaller number of moles. This gives a ratio in which no number is less than 1.

The experimental molar ratio of

The experimental molar ratio of

**Note**: It is not incorrect to divide by the larger number and express the above ratios as 1:0.213 and 0.213:1, respectively. It is just a matter of preference.

**EXAMPLE 2**

A student reacted 10.2 g of barium chloride with excess silver nitrate, according to the equation

She isolated 14.5 g of silver chloride. What was her experimental molar ratio of

**Solution**

**Step 1**: Convert all masses into moles

**Step 2**: Calculate the molar ratios

The experimental molar ratio of

Here is a video example:

video from: Noel Pauller