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Questions and Answers
Which of the following is NOT a necessary condition for chemical equilibrium?
Which of the following is NOT a necessary condition for chemical equilibrium?
- Presence of a catalyst (correct)
- Constant temperature
- Equal concentrations of reactants and products
- Closed system
What is the effect of increasing the concentration of a reactant in a reversible reaction at equilibrium?
What is the effect of increasing the concentration of a reactant in a reversible reaction at equilibrium?
- Equilibrium shifts towards the right (forward) (correct)
- Equilibrium shifts towards the left (reverse)
- Equilibrium is disrupted
- No effect on the equilibrium
Which of the following is affected by changes in pressure in a reversible reaction at equilibrium?
Which of the following is affected by changes in pressure in a reversible reaction at equilibrium?
- Gaseous equilibria (correct)
- Solid equilibria
- Liquid equilibria
- All types of equilibria
What does Le Chatelier's principle state?
What does Le Chatelier's principle state?
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How does increasing the concentration of a product in a reversible reaction at equilibrium affect the equilibrium?
How does increasing the concentration of a product in a reversible reaction at equilibrium affect the equilibrium?
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Study Notes
Chemical Equilibrium
- A necessary condition for chemical equilibrium is not reached when the reaction rates are not equal and opposite.
Effect of Concentration Changes
- Increasing the concentration of a reactant in a reversible reaction at equilibrium shifts the equilibrium to the right, favoring the forward reaction.
- Increasing the concentration of a product in a reversible reaction at equilibrium shifts the equilibrium to the left, favoring the reverse reaction.
Effect of Pressure Changes
- The yield of the reaction is affected by changes in pressure in a reversible reaction at equilibrium.
Le Chatelier's Principle
- Le Chatelier's principle states that when a system in equilibrium is subjected to a change, the equilibrium will shift in a direction that tends to counteract the change.
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