Limiting Reactants and Percent Yield

Front

What is a limiting reactant?

Back

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

Front

What is an excess reactant?

Back

Substance that is not used up completely in a chemical reaction.

Front

Define theoretical yield.

Back

The maximum amount of product that could be formed from given amounts of reactants, based on stoichiometric calculations.

Front

Define actual yield.

Back

The measured amount of a product obtained from a chemical reaction.

Front

What is percent yield?

Back

The ratio of the actual yield to the theoretical yield, expressed as a percentage.

Front

How do you calculate percent yield?

Back

Percent Yield = (Actual Yield / Theoretical Yield) x 100%.

Front

What is stoichiometry?

Back

The calculation of reactants and products in chemical reactions based on balanced equations.

Front

What is the mole ratio?

Back

The ratio of moles of one substance to the moles of another substance in a balanced chemical equation.

Front

How do you determine the limiting reactant in a reaction?

Back

By calculating the amount of product each reactant can produce and identifying the one that produces the least.

Front

What is the balanced equation for the reaction of sulfur dioxide and phosphorus pentachloride?

Back

SO2 + PCl5 → SOCl2 + POCl3.