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On increasing the concentration of reactants in a reversible reaction, then equilibrium constant will

Correct answer: C. unchanged

  • A. depend on the concentration
  • B. increase
  • C. unchanged
  • D. decrease

Explanation

The equilibrium constant (K) for a given chemical reaction is only affected by changes in temperature and not by changes in the concentrations of reactants or products. When you increase the concentration of reactants, the system may shift to counteract this change, according to Le Chatelier's Principle, but the value of the equilibrium constant itself remains the same. Options A, B, and D incorrectly suggest that concentration affects the equilibrium constant. Option C correctly states that the equilibrium constant remains unchanged.

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About Chemical Equilibrium

Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.

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