a) the concentration of HI will rise as the system approaches equilibrium b) the

Question

a) the concentration of HI will rise as the system approaches equilibrium

b) the concentrations of HI and I2 will increase as the system approaches equilibrium

c) the concentration of H2 and I2 will increase as the system approaches equilibrium

EXPLAIN YOUR ANSWER

14) For the reaction, H2 (g) + I2 (g) 2HI (g), Kc= 50.2 at 445 Degree C. If [H2] = [I2] = [HI] = 1.75*10^-3 M at 445 Degree C, which one of the following statements is true? [hint: what is Q?] a) the concentration of HI will rise as the system approaches equilibrium b) the concentrations of HI and I2 will increase as the system approaches equilibrium c) the concentration of H2 and I2 will increase as the system approaches equilibrium

Explanation / Answer

correct answer is A

Qc = (1.75 x 10^-3)^2 / (1.75 x 10^-3)(1.75 x 10^-3) =1.00 << Kc

the system is not at equilibrium and the reaction will shift on the right so the concentration of HI will increase

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