Chemical Equilibrium and Reactions

What is the scientific term for a state of balance in a system?

• Stability

• Equilibrium

• Harmony

• Stasis

What happens during a chemical equilibrium state?

• All chemical reactions stop completely.

• Reactants are completely used up to form products.

• The forward and reverse reactions occur at the same rate.

• Only the reverse reaction takes place.

What does Le Chatelier's Principle describe?

• How to create new chemical reactions.

• How a system at equilibrium responds to a disturbance.

• The speed at which chemical reactions occur.

• The amount of energy needed for a reaction to start.

In the Haber process (N2 + 3H2 <=> 2NH3), if more nitrogen gas (N2) is added to a system at equilibrium, what will happen?

• The reaction will stop.

• More hydrogen gas (H2) will be produced.

• More ammonia (NH3) will be formed.

• The temperature of the system will decrease.

What important product is made using the Haber process that helps grow food?

• Explosives

• Fertilizers

• Medicines

• Plastics

In the Haber process (N2 + 3H2 <=> 2NH3), what happens if you increase the pressure?

• More ammonia is made.

• More nitrogen and hydrogen are made.

• The reaction stops.

• The color changes to pink.

What kind of temperature helps a reaction that releases heat (exothermic reaction) make more products?

• High temperature

• Low temperature

• Changing temperature

• No temperature change

When hydrochloric acid was added to the pink cobalt solution, what color did the solution become?

• Pink

• Blue

• Green

• Clear