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In which of the following cases is the reaction farthest from completion?

Correct answer: B. K=10-2

  • A. K=1
  • B. K=10-2
  • C. K=10
  • D. K=102

Explanation

The equilibrium constant K measures how far a reaction proceeds to products at equilibrium.K≫1 → equilibrium lies far to the products side (reaction nearly complete).K≪1 → equilibrium lies far to the reactants side (reaction hardly proceeds).K≈1→ significant amounts of both reactants and products.Very small; equilibrium lies strongly to the reactant side → reaction is farthest from completion (only a small fraction converts to products). (Correct choice)

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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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