Question

9. What does it mean if Keq < 1, at equilibrium? The concentration of reactants is greater than the concentration of products. b. The concentration of products is greater than the concentration of reactants. The rate of the forward reaction is greater than the rate of the reverse reaction. c. d. The rate of the reverse reaction is greater than the rate of the forward reaction. e. The concentration of products and reactants are about the same. Which of the following equilibrium constant values best represents a reaction where the concentration of products is almost equal to the concentration of reactants? a. 3.4x 106 10. b. 2.9 x 10-6 c. 9.8×10-1 d. 1.5×10-1 11. Express the equilibrium constant for the following reaction. N2(g) + 3 Hz(g)←→ 2 NH3(g) NH3I [N2J[H21 1/3 e, K= a. [N2IH2l NH3l NH26 [N2H2) NH3 Express the equilibrium constant for the following reaction: 2 Na(s) + 2 H,O(l)-→ 2 NaOH(aq) + H2(g) 12. Keq = [NaOH]2[H2] Keq a. [Na] [H20) [NaOH] [H2]

Answer 1

9. What does it mean if Keg 1, at equilibrium? The concentration of reactants is greater than the concentration of products. The concentration of products is greater than the concentration of reactants. The rate of the forward reaction is greater than the rate of the reverse reaction. The rate of the reverse reaction is greater than the rate of the forward reaction. The concentration of products and reactants are about the same. b. c. e. Which of the following equilibrium constant values best represents a reaction where the concentration of products is almost equal to the concentration of reactants? a. 3.4 x 106 10. b. 2.9 x 10-6 c., 9.8 x 10- d. 1.5 x 10-1 11. Express the equilibrium constant for the following reaction. N(g)+ 3 H(g)2NH,(g) 1/3 с.) К= [N2IH2 NH26 [N21[H2] b, K= NH3 12. Express the equilibrium constant for the following reaction: 2 Na(s) + 2 H2O(1)-→ 2 NaOH(aq) + H2(g) NaH20 [Na0H] [H2] [NaO [Na (H20 a. Keq = [Na] [H20)

explanation:

9) Keq > 1 means forward > backward

     Keq < 1 means forward < backward

     Keq = 1 means forward = backward

10 ) 9.8 x 10^-1 means which is 1 . Keq = 1 . so that forward reaction rate = backward reaction rate

11)   equilibrium constant = product concentration / reactants concentration

                                        = [NH3]^2 / [N2] [H2]^3

12)   solids and liquids are not part in the equilibrium constant

so answer is d)