For a certain reversible reaction at a given temperature
CHEMISTRY · Single correct · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)
Problem
For a certain reversible reaction at a given temperature, the instantaneous rate of the forward reaction is reported as 0.18 mol L⁻¹ s⁻¹, whereas the rate of the reverse reaction is 0.24 mol L⁻¹ s⁻¹ at the same moment. Which statement best describes the direction of net chemical change at that instant?
(a) Both rates indicate equilibrium has been reached, so there is no net chemical change.
(b) Reactants are being converted to products because the forward rate is greater than the reverse rate.
(c) Products are being converted to reactants because the reverse rate exceeds the forward rate.
(d) The direction of net change cannot be determined without knowing concentrations and rate constants.