#### Science - 2018-19

# CH.4 b - Stoichiometry

The student will **investigate** and **understand** that chemical quantities are based on molar relationships. Key concepts include:

b) stoichiometric relationships.

**Bloom's Levels:** Analyze; Understand

*Adopted: 2010*

### BIG IDEAS

- Balanced chemical equations represent the ratios of substances that react with one another to produce different substances.

- I can determine how many cookies I can make from a set of ingredients.

### UNDERSTANDING THE STANDARD

Stoichiometry involves quantitative relationships. Stoichiometric relationships are based on mole quantities in a balanced equation.

Total grams of reactant(s) = total grams of product(s).

### ESSENTIALS

In order to meet this standard, it is expected that students will

b) perform stoichiometric calculations involving the following relationships:

- mole-mole;

- mass-mass;

- mole-mass;

- mass-volume;

- mole-volume;

- volume-volume;

- mole-particle;

- mass-particle; and

- volume-particle.

identify the limiting reactant (reagent) in a reaction.

calculate percent yield of a reaction.

### KEY VOCABULARY

actual yield, excess reactant, limiting reactant, mole ratio, percent yield, stoichiometry, theoretical yield

*Updated: Nov 19, 2017*