# What is an example of a percent yield practice problem?

##### 1 Answer

Here's a nice example of a percent yield problem. Consider the following chemical equation:

*Let's say you have* *and excess* *for this reaction, how many grams of* *can you produce with 100% yield?*

Since we know that

This value represents our theoretical yield - what is produced for a **100%** yield reaction.

*What if, instead of 45.6 g, you actually produce 28.9 g, what can you say about* *and about the reaction's percent yield?*

Well, since we've obtained less than expected, we must conclude that **actual yield**, which will determine the reaction's percent yield at

We can work backwards and determine how much of the

You can double-check your calculations by using the reaction's percent yield. Since we know that we started with 34.4 g of

As you can see, percent yield links how much of a reactant actually reacted with how much of a product was actually produced.