Limiting Reactant and % Yield Review

Front

What is a limiting reactant?

Back

The limiting reactant is the substance that is used up first in a chemical reaction, limiting the amount of product that can be formed.

Front

How do you determine the limiting reactant in a reaction?

Back

To determine the limiting reactant, calculate the moles of each reactant and compare the mole ratios from the balanced equation.

Front

What is the theoretical yield?

Back

The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, based on stoichiometric calculations.

Front

What is percent yield?

Back

Percent yield is the ratio of the actual yield to the theoretical yield, multiplied by 100, indicating the efficiency of a reaction.

Front

How do you calculate percent yield?

Back

Percent yield = (Actual yield / Theoretical yield) x 100.

Front

What is the balanced equation for the reaction of phosphorus and chlorine?

Back

P4 + 6Cl2 → 4PCl3.

Front

If 84.3 g of P4 reacts with excess Cl2, how much PCl3 is produced?

Back

97 g of PCl3.

Front

What is the balanced equation for the formation of iron sulfide?

Back

Fe + S → FeS.

Front

How many grams of FeS are formed from 13.2 g of Fe?

Back

20.7 g of FeS.

Front

What is the balanced equation for the formation of water from hydrogen and oxygen?

Back

2H2 + O2 → 2H2O.