Chapter 18

go fast or go back

California State Standards

Reaction Rates

8. Chemical reaction rates depend on factors that influence the frequency of collision of reactant molecules. As a basis for understanding this concept:

1. Students know the rate of reaction is the decrease in concentration of reactants or the increase in concentration of products with time.
2. Students know how reaction rates depend on such factors as concentration, temperature, and pressure.
3. Students know the role a catalyst plays in increasing the reaction rate.
4. * Students know the definition and role of activation energy in a chemical reaction.

Chemical Equilibrium

9. Chemical equilibrium is a dynamic process at the molecular level. As a basis for understanding this concept:

1. Students know how to use Le Chatelier's principle to predict the effect of changes in concentration, temperature, and pressure.
2. Students know equilibrium is established when forward and reverse reaction rates are equal.
3. * Students know how to write and calculate an equilibrium constant expression for a reaction.

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