Chem 120- Exam 1 Questions and
Answers
Equilibrium - -Occurs when rate of forward and reverse reaction are equal
- What does K equal - -Concentration of products over concentration of
reactants
- What does reaction rates depend on? - -Mechanism of reaction, which is
determined by number of colliding species
- What does a large K value entail? - -The more favorable the rate of the
forward reaction relative to the backward --> the farther the right the
reaction will go
- What does a large K value NOT ensure? - -That it will proceed at a fast
rate. Some may be slow.
- Fill in blank: When reaction A and B are initiated, rate of forward reaction is
large because _____________. - -A and B concentrations are large.
- FIB: Backward reactions are slow because _________. - -C and D
concentrations are so small.
- Dynamic equilibrium - -Forward and backward reactions continue at equal
rates
- Equilibrium can be written for these 3 types of chemical processes - -1.
Dissociation
2. Formation of products
3. Distribution between phases ( water & non-aqueous solutions, absorption)
- What are 4 types of equilibria? - -1. Acid-base
2. Solubility
3. Complex formation
4. Phase distribution
- What is Le Chatlier's principle? - -That the equilibrium of a reaction can
shift depending on stress of a system. Equilibrium will try to counteract
stress
- What are three types of stress? - -1. Temperature
2. Concentration
3. Pressure
Answers
Equilibrium - -Occurs when rate of forward and reverse reaction are equal
- What does K equal - -Concentration of products over concentration of
reactants
- What does reaction rates depend on? - -Mechanism of reaction, which is
determined by number of colliding species
- What does a large K value entail? - -The more favorable the rate of the
forward reaction relative to the backward --> the farther the right the
reaction will go
- What does a large K value NOT ensure? - -That it will proceed at a fast
rate. Some may be slow.
- Fill in blank: When reaction A and B are initiated, rate of forward reaction is
large because _____________. - -A and B concentrations are large.
- FIB: Backward reactions are slow because _________. - -C and D
concentrations are so small.
- Dynamic equilibrium - -Forward and backward reactions continue at equal
rates
- Equilibrium can be written for these 3 types of chemical processes - -1.
Dissociation
2. Formation of products
3. Distribution between phases ( water & non-aqueous solutions, absorption)
- What are 4 types of equilibria? - -1. Acid-base
2. Solubility
3. Complex formation
4. Phase distribution
- What is Le Chatlier's principle? - -That the equilibrium of a reaction can
shift depending on stress of a system. Equilibrium will try to counteract
stress
- What are three types of stress? - -1. Temperature
2. Concentration
3. Pressure
