Stoichiometry

Front

What is an Excess Reagent?

Back

The amount of a reactant that is not completely used up in a chemical reaction; it is what you have left over.

Front

What is a Limiting Reactant?

Back

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

Front

How are mole ratios obtained?

Back

Mole ratios are obtained from the balanced chemical equation.

Front

If you have 2.0 moles of Magnesium and predict that 1.5 moles are used, what type of reactant is Magnesium?

Back

Excess Reactant.

Front

In the reaction 2 CO (g) + O2(g) → 2 CO2(g), how many Liters of CO2 are produced by the reaction of 8 moles of O2 with excess CO?

Back

358.4 Liters.

Front

What is the purpose of a balanced chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation, which reflects the conservation of mass.

Front

Define Stoichiometry.

Back

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

Front

What does it mean if a reactant is in excess?

Back

It means there is more of that reactant than is needed to completely react with the limiting reactant.

Front

What is the significance of the coefficients in a balanced equation?

Back

They indicate the relative number of moles of each substance involved in the reaction.

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.