Equilibrium

This symbol indicates that a reaction is _____

• reversible

• irreversible

Changes in pressure will only affect substances that are in the ______ state.

• solid

• gas

• liquid

What are the two factors that help determine that equilibrium is reached?

• Forward reaction rate is faster than the reverse and the concentrations are equal

• Forward and reverse reaction rates are equal and concentrations are equal

• Forward and reverse reaction rates are equal and concentrations are constant

When the rate of the forward reaction is equal to the rate of the backward reaction, the system is said to be in _____

• Chemical Balance

• Chemical Constant

• Chemical Reaction

• Chemical Equilibrium

Which of the two graphs reaches equilibrium?

• Neither

• The left

• Both

• The right

For the reaction...

SO₂ + O₂ ⇌ SO₃

If the concentration of SO₂ is increased, the equilibrium of the reaction will shift ___________.

• left

• right

• left and right

• neither left or right

Which of the following is NOT true at equilibrium?

• The concentrations of reactants and products do not change.

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

• The concentration of the reactants is equal to the concentration of the products.

• The forward and reverse reactions continue to occur.

For the reaction...

SO₂ + O₂ <−> SO₃

If the equilibrium shifts to the right, the concentration of O₂ will ___________.

• increase

• decrease

• double

• stay the same

The following factors affect the position of equilibrium EXCEPT

• Concentration

• State of Matter

• Temperature

• Pressure

Le Chatelier's Principle states that if a chemical system at equilibrium is stressed,

• the system will adjust to increase the stress

• the system will adjust to reduce the stress

• the system will not adjust