Percent Yield & Limiting Reactants

Front

What is actual yield?

Back

The actual yield is the amount of product that is actually produced when a chemical reaction is carried out, measured in grams.

Front

What is theoretical yield?

Back

The theoretical yield is the maximum amount of product that could be formed from a given amount of reactants, assuming complete conversion and no losses.

Front

What is percent yield?

Back

Percent yield is a measure of the efficiency of a reaction, calculated as (actual yield / theoretical yield) x 100%.

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product that can be formed.

Front

What is an excess reactant?

Back

The excess reactant is the substance that remains after a chemical reaction has gone to completion.

Front

How do you calculate percent yield?

Back

Percent yield = (actual yield / theoretical yield) x 100%.

Front

In a reaction, if 10 grams of A reacts with 15 grams of B to produce 5 grams of C, what is the actual yield?

Back

The actual yield is 5 grams of C.

Front

If the theoretical yield of a reaction is 20 grams and the actual yield is 15 grams, what is the percent yield?

Back

Percent yield = (15 g / 20 g) x 100% = 75%.

Front

What happens to the excess reactant in a chemical reaction?

Back

The excess reactant remains unreacted after the limiting reactant is completely consumed.

Front

How can you identify the limiting reactant in a reaction?

Back

The limiting reactant can be identified by calculating the amount of product each reactant can produce and determining which one produces the least.