1. Ch. 11 The Mathematics of Chemical Equations
11-1: Stoichiometry

2. Stoichiometry
The study of quantitative (measurable) relationship that exists in chemical formulas and chemical reactants
Numerically relates reactants and products

3. Example Stoichiometry Problem
You know that you can produce water by burning hydrogen gas.
What is the equation?
H2 + O2  H2O
If you wanted to produce 15 grams of water this way, how much hydrogen gas would you need?

4. In a balanced chemical equation…
The coefficients represents moles of substances.
They can also represent numbers of particles.
They DO NOT represent grams.
The mole must be used for this.

5. Back to the equation H2 + O2  H2O
2 moles of H2 react with one mole of O2 to produce 2 moles of H2O
To convert from moles of one chemical to another, use the coefficients from the balanced chemical equation.
SP1, pg. 352
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