Limiting/Excess Reactants

Front

What is the first step in solving a stoichiometric problem?

Back

Write a balanced chemical equation.

Front

What is an excess reactant?

Back

A reactant that remains after a chemical reaction stops.

Front

In the reaction P4 + 3O2 → P4O6, if 12 moles of P4 react with 15 moles of O2, what is the limiting reactant?

Back

O2

Front

Where are mole ratios obtained from?

Back

Balanced chemical equation.

Front

In the reaction 4NH3 + 6NO → 5N2 + 6H2O, what is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?

Back

NH3

Front

Define limiting reactant.

Back

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

Front

What is stoichiometry?

Back

The calculation of reactants and products in chemical reactions.

Front

How do you determine the limiting reactant in a reaction?

Back

By comparing the mole ratio of the reactants used to the mole ratio in the balanced equation.

Front

What is the mole ratio of reactants in the reaction 2H2 + O2 → 2H2O?

Back

2:1 for H2 to O2.

Front

If 5 moles of A react with 10 moles of B in the reaction A + 2B → C, what is the limiting reactant?

Back

A.