Question

In a reversible chemical reaction equilibrium is said to have been established when the:

• A. concentration of reactants and produces are equal
• B. opposing reactions cease
• C. speeds of opposing reactions become equal
• D. temperatures of opposing reactions are equal

Answer 1

Answer: (C)

speeds of opposing reactions become equal

In a reversible chemical reaction, equilibrium is said to have been established when the speeds of opposing reactions become equal. Neither the forward reaction nor the backward reaction has ceased. Hence, the state of equilibrium refers to the dynamic state.