What Is Stoichiometry

What is Stoichiometry? By prof Devender Singh Roorkee Notes and Examples Chemistry

Objectives  Identify

the quantitative relationships in a balanced chemical equation.  Determine the mole ratios from a balanced chemical equation.

What is Stoichiometry?  Stoichiometry:

The study of quantitative relationships between amounts of reactants used and products formed by a chemical reaction.  Once again, the Law of Conservation of Mass must be obeyed.

In A Balanced Chemical Equation  In

a balanced chemical equation, the reactants and products can be interpreted as particles, moles, or mass.  4Fe(s) + 3O2(g)  2Fe2O3(s)  How

many moles of each?  How many grams of each?

Practice Problems  Pg.

356  1a-e

From A Balanced Chemical Equation  From

a balanced chemical equation, we can create mole-to-mole ratios.  Mole Ratio: a ratio between the numbers of moles of any two substances in a balanced chemical equation.  The coefficients act as the numbers in the mole ratio.

Practice Problems

Why Do I Need to Know This?  Mole

ratios are the key to calculations based upon a chemical equation.