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Consider the following elementary reaction: ICl(g) +H2 (g) ? HI (g) +HCl (g) Sup

ID: 636642 • Letter: C

Question

Consider the following elementary reaction:

ICl(g) +H2(g) ? HI(g) +HCl(g)

Suppose we let k1 stand for the rate constant of this reaction, and k?1 stand for the rate constant of the reverse reaction.

Write an expression that gives the equilibrium concentration of H2 in terms of k1, k?1, and the equilibrium concentrations of ICl, HI, and HCl.

Consider the following elementary reaction: ICI(g) +H2(g)-1 I(g) + HCl(g) Suppose we let k, stand for the rate constant of this reaction, and k_ stand for the rate constant of the reverse reaction Write an expression that gives the equilibrium concentration of H, in terms of k,, k, and the equilibrium concentrations of IC, HI, and HCl. H]-D

Explanation / Answer

rate of forward reaction = K1[ICl][H2]

rate of backward reaction = K-1[HI][HCl]

at equilibrium, rate of forward reaction = rate of backward reaction

         K1[ICl][H2] = K-1[HI][HCl]

         K1/k-1 = [HI][HCl] /[ICl][H2]

   K = equilibrium constant = K1/k-1 = [HI][HCl] /[ICl][H2]

[H2] = [HI][HCl] /[ICl]*(K-1/K1)