CHEM 104 Exam 6 Questions and
Answers Verified Solutions Latest Update
2026/2027
Question:
• Define chemical equilibrium
Answer:
Forward and reverse reactions occur at equal rates and concentrations of products and reactants
remain constant (not necessarily equal)
Question:
• What are the 4 important principles of equilibrium?
Answer:
1) All reactions eventually
reach equilibrium
2) All species are present at equilibrium
3) Equilibrium is dynamic (though no observable changes)
4) Le Chatelier's principle - but will never return exactly to initial equilibrium
concentration
Question:
• Define LeChatelier's principle
Answer:
When a chemical system at equilibrium is disturbed, it returns to equilibrium by counteracting
disturbance
Question:
• How do gases affect position of equilibrium?
Answer:
, Change in pressure of gas in the system will cause a shift Addition of gas not in system has no
effect
Question:
• How does temperature affect equilibrium?
Answer:
Temp = stress Heat considered a reactant in endothermic reactions and a product in exothermic
reactions
Question:
• How do catalysts affect equilibrium?
Answer:
They have no effect
Question:
• How does the addition of a solvent (ex. water) affect equilibrium?
Answer:
Causes a decrease in concentration of all aqueous solutions - shifts to side with greatest amount of
aqueous solutions
Question:
• What is the equilibrium constant (Keq/Kc/Kp)?
Answer:
Products over reactants, raised to power of respective coefficients in balanced chemical equation
- Has no units
- Solids and pure liquids not included
- Always positive, but can be large or small
Question:
• What is the magnitude of Kc?
Answers Verified Solutions Latest Update
2026/2027
Question:
• Define chemical equilibrium
Answer:
Forward and reverse reactions occur at equal rates and concentrations of products and reactants
remain constant (not necessarily equal)
Question:
• What are the 4 important principles of equilibrium?
Answer:
1) All reactions eventually
reach equilibrium
2) All species are present at equilibrium
3) Equilibrium is dynamic (though no observable changes)
4) Le Chatelier's principle - but will never return exactly to initial equilibrium
concentration
Question:
• Define LeChatelier's principle
Answer:
When a chemical system at equilibrium is disturbed, it returns to equilibrium by counteracting
disturbance
Question:
• How do gases affect position of equilibrium?
Answer:
, Change in pressure of gas in the system will cause a shift Addition of gas not in system has no
effect
Question:
• How does temperature affect equilibrium?
Answer:
Temp = stress Heat considered a reactant in endothermic reactions and a product in exothermic
reactions
Question:
• How do catalysts affect equilibrium?
Answer:
They have no effect
Question:
• How does the addition of a solvent (ex. water) affect equilibrium?
Answer:
Causes a decrease in concentration of all aqueous solutions - shifts to side with greatest amount of
aqueous solutions
Question:
• What is the equilibrium constant (Keq/Kc/Kp)?
Answer:
Products over reactants, raised to power of respective coefficients in balanced chemical equation
- Has no units
- Solids and pure liquids not included
- Always positive, but can be large or small
Question:
• What is the magnitude of Kc?
