Which of the following expressions is the correct equilibrium-constant expressio

Question

Which of the following expressions is the correct equilibrium-constant expression for the reaction below? [H^+][HCO^-_3] [CO_2]/[H^+][HCO_3^-] [H^+][HCO_3^-]/[CO_2][H_2O] [CO_2][H_2O]/[H^+][HCO^+_3] [H^+][HCO^-_3]/[CO_2] How is the reaction quotient used to determine whether a system is at equilibrium? The reaction quotient must be satisfied for equilibrium to be achieved. At equilibrium, the reaction quotient is undefined. The reaction is at equilibrium when Q = K_eq. The reaction is at equilibrium when Q > K_eq. The reaction is at equilibrium when Q

Explanation / Answer

(3) CO2(s) + H2O(l) <----> H+(aq) + HCO3- (aq)

Equilibrium constant , Keq = [H+][HCO3-]

Since the concentration of solids & concentration of solvent medium will not change the equilibrium

So option (A) is correct

(4) option (C) is correct

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