Chemical Equilibrium Concepts

What happens in a chemical reaction when it reaches equilibrium?

• The reaction stops completely.

• Reactants are used up faster than products are formed.

• Products are formed at the same rate that they break down into reactants.

• The temperature of the reaction becomes zero.

Which of these can change the balance of a chemical equilibrium?

• Changing the color of the substances.

• Altering the concentration, temperature, or pressure.

• Adding a new type of container.

• Shaking the reaction mixture.

What is an equilibrium constant (Keq)?

• A measure of how fast a reaction happens.

• A molar ratio of products over reactants when a reaction is balanced.

• The total amount of energy in a reaction.

• The weight of the chemicals in a reaction.

In chemistry, what does molarity (M) mean?

• The total mass of a solution.

• The number of moles of solute per liter of solution.

• How much light a solution can absorb.

• The density of a substance.

What does the 'R' in the RICE table stand for?

• Reactants

• Reaction

• Rate

• Ratio

What does the 'I' in the RICE table represent?

• Ions

• Ideal

• Initial

• Important

What does the 'C' in the RICE table represent?

• Constant

• Concentration

• Change

• Calculation

If the initial amount of a substance is 1.00 M, and the possible changes (x) are 2.13 M or 0.968 M, which value for 'x' is correct?

• 2.13 M

• 0.968 M

• Both are correct

• Neither is correct