Apologia Chemistry Module 15

This symbol indicates that a reaction is ____________

• reversible
• irreversible

What are the two factors to look for when determining if the reaction is at equilibrium?

• Forward reaction rate is faster than the reverse and concentrations are equal
• Forward and reverse reaction rates are equal and concentration is constant
• Forward and revers reaction rates are equal and concentration is equal
• Forward reaction rate is faster than the reverse and concentration is equal

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

• Chemical Equilibrium
• Chemical Balance
• Stoichiometry
• Chemical Reaction

At what time the reaction reached equilibrium?

• t₁
• t₂
• t₃
• t₄

How do catalysts increase the rate of reaction?

• The frequency of collisions is the increased
• the activation energy is lowered
• the energy of collisions is increased
• Both the frequency and energy of collisions is increased

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

• gaseous
• liquid
• solid
• plasma

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

2SO₂(g)+O₂(g)⇌2SO₃(g)
Removing O₂(g) will

• shift equilibrium right
• shift equilibrium left
• decrease temperature
• have no change

2SO₂(g)+O₂(g)⇌2SO₃(g)
Adding SO₂(g) will

• shift equilibrium right
• shift equilibrium left
• increase rate of reaction
• have no change

The following factors affect the position of equilibrium EXCEPT

• Concentration
• Pressure
• Temperature
• States of matter