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What is the effect of adding a strong acid to a reaction at equilibrium involvin

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Question: What is the effect of adding a strong acid to a reaction at equilibrium involving a weak base?

Options:

  1. Shifts equilibrium to the right
  2. Shifts equilibrium to the left
  3. No effect on equilibrium
  4. Increases reaction rate

Correct Answer: Shifts equilibrium to the left

Solution: 

Adding a strong acid increases the concentration of H+ ions, which can react with the weak base, shifting the equilibrium to the left to favor the formation of reactants.

What is the effect of adding a strong acid to a reaction at equilibrium involvin

Practice Questions

Q1
What is the effect of adding a strong acid to a reaction at equilibrium involving a weak base?
  1. Shifts equilibrium to the right
  2. Shifts equilibrium to the left
  3. No effect on equilibrium
  4. Increases reaction rate

Questions & Step-by-Step Solutions

What is the effect of adding a strong acid to a reaction at equilibrium involving a weak base?
  • Step 1: Understand that a reaction at equilibrium has both reactants and products present in certain concentrations.
  • Step 2: Identify that a weak base is a substance that does not completely dissociate in water and can accept protons (H+ ions).
  • Step 3: Recognize that adding a strong acid increases the concentration of H+ ions in the solution.
  • Step 4: Realize that the added H+ ions can react with the weak base, forming its conjugate acid.
  • Step 5: Apply Le Chatelier's Principle, which states that if a system at equilibrium is disturbed, it will shift to counteract the disturbance.
  • Step 6: Conclude that the reaction will shift to the left (toward the reactants) to reduce the concentration of the added H+ ions, favoring the formation of reactants.
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