Reaction Rates and Equilibrium

CPC U7 LT4 Reaction Rates and Equilibrium

Concept and Skill Review

Multiple Choice

It is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back.

• reversible reaction

• irreversible reaction

• decomposition reaction

• synthesis

Multiple Choice

Identify the labels (a) and (b) on the graph.

• a is concentration of reactants and b is the concentration of product

• a is concentration of product and b is the concentration of reactant

• a is the volume of reactants and b is the volume of product

• a the mass of reactants and b is the mass of product

Multiple Choice

This symbol indicates that a reaction is ____________

• reversible

• irreversible

Multiple Choice

Define chemical equilibrium.

• A reaction is reversible.
• The concentration of the reactants is equal to the concentration of the products.
• The rate of a forward reaction is equal to the rate of the reverse reaction.
• The reaction stops and no further change in concentration occurs.

Multiple Choice

Which of the two graphs reaches equilibrium?

• The left one.

• The right one.

• Both of them.

• Neither.

Multiple Choice

At what time (in seconds) is equilibrium established?

• 0 seconds

• 1 second

• 5 seconds

• 10 seconds

Multiple Choice

Which of the following is NOT true at equilibrium?

• The forward and reverse reactions proceed at the same rate.
• The concentrations of reactants and products do not change.
• The concentration of the reactants is equal to the concentration of the products.
• The forward and reverse reactions continue to occur.

Multiple Choice

Which of these reactions reaches equilibrium?

• All except experiment 1

• Only experiment 1

• All except experiment 2

• All of them

• All except experiment 4