Limiting Reagents & Percent Yield | Professor Dave Flashcard

Front

What is a limiting reagent in a chemical reaction?

Back

The substance that is completely used up first

Front

If you have 7 baloney and 10 bread, how many sandwiches can you make according to the given example?

Back

5 sandwiches

Front

Which of the following is NOT a correct step in determining the limiting reagent? Using stoichiometric ratios, Assuming the reactant in lesser amount is always the limiting reagent, Converting quantities to moles, Calculating potential product amounts

Back

Assuming the reactant in lesser amount is always the limiting reagent

Front

What happens to the excess reagent in a reaction?

Back

It remains unused and is left over

Front

In the example with baloney and bread, which is the limiting reagent?

Back

Bread

Front

What is percent yield?

Back

The ratio of actual yield to theoretical yield multiplied by 100

Front

What does the theoretical yield represent?

Back

The maximum possible amount of product under perfect conditions

Front

If 10 grams of product were expected but only 8.4 grams were collected, what is the percent yield?

Back

84%

Front

Why is it necessary to convert masses to moles when determining the limiting reagent?

Back

To compare quantities accurately

Front

What is the role of stoichiometric ratios in determining the limiting reagent?

Back

They show how reactants combine in fixed proportions.