Answer: does not shift its position.
- A drives it fully forward
- B drives it fully backward
- C does not shift its position
- D makes the reaction stop
Correct answer: C. does not shift its position
Explanation: A catalyst speeds up both directions equally, so it reaches equilibrium faster without shifting it.
As the reaction proceeds, reactant concentration falls and product concentration rises until both level off at equilibrium.
Concept context
When forward and reverse reaction rates are equal, equilibrium is reached. Learn about Kc, Kp, Le Chatelier's principle, and acid-base equilibria, including pH, buffer solutions, and solubility product.