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 EXPLAIN YOUR ANSWER

Explanation / Answer

The reaction quotient (Q) measures the relative amounts of products and reactants present during a reaction at a particular point in time. The reaction quotient aids in figuring out which direction a reaction is likely to proceed.

The main difference between K and Q is that K describes a reaction that is at equilibrium, whereas Q describes a reaction that is not at equilibrium. To determine Q, the concentrations of the reactants and products must be known.

Qc = [HI]2/[H2][I2] = 1

If Q < K, then the reaction favors the product. The ratio of product to reactant is less than that for the system at equilibrium

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