Multiple Choice
Which of the following is the correct equilibrium constant expression for the reaction: 3H+(aq) + PO4^3-(aq) ⇌ H3PO4(aq)?
16. Chemical Equilibrium
Equilibrium Constant K
Back16. Chemical Equilibrium
Equilibrium Constant K
- Multiple Choice
Provide K expression for the reverse of the following reaction:
Fe2O3(s) + 3 H2(g) ⇌ 2 Fe(s) + 3 H2O(g)
- Multiple Choice
Which of the reactions is likely to produce more O2 at equilibrium at 25°C?
- Multiple Choice
Consider the reaction A(g) ⇌ B(g) + C(g), with kforward of 5.7 x 10–2 and kreverse of 3.8 x 10–4. Which would be greater at equilibrium, partial pressure of A or partial pressures of B and C?
- Open Question
What can be said about the relative amounts of reactants and products when K is approximately 1?
- Open Question
When glucose, a sugar, reacts fully with oxygen, carbon dioxide and water are produced according to the equation: C6H12O6(s) + 6 O2(g) ⟺ 6 CO2(g) + 6
H2O(l) Write the expression for Kc for this reaction.
- Open Question
For a particular reaction K = 98000. What can be said about this reaction?
- Multiple ChoiceAt T = 700 K, the equilibrium constant for the reaction CCl4(g) ⇌ C(s) + 2 Cl2(g) is K_p = 0.76. A flask is charged with 3.0 atm of CCl4(g) at 700 K, which is then allowed to reach equilibrium. What is the partial pressure of Cl2(g) in the flask?
- Multiple ChoiceAt a certain temperature, the equilibrium constant Kc for the reaction 2 C(s) + O2(g) ⇌ 2 CO(g) is 4.72. What is the equilibrium constant Kc for the reverse reaction CO(g) ⇌ C(s) + 0.5 O2(g) at the same temperature?
- Multiple ChoiceCalculate the equilibrium constant Kc at 256 K for the reaction SO2(g) + Cl2(g) ⇌ SO2Cl2(g) if Kp = 42 at this temperature. Assume the reaction involves gases and use the relation between Kp and Kc.
- Multiple ChoiceCalculate the equilibrium constant Kc at 304 K for the reaction SO2(g) + Cl2(g) ⇌ SO2Cl2(g) if the equilibrium constant Kp is 33.0 at this temperature.
- Multiple ChoiceCalculate the equilibrium constant Kc for the reaction N2O4(g) ⇌ 2NO2(g) given that at equilibrium at 100°C, [N2O4] = 0.0014 M and [NO2] = 0.0172 M.
- Multiple ChoiceConsider the reaction: 2CO(g) + O2(g) ⇌ 2CO2(g). What is the correct equilibrium expression for this reaction?
- Multiple ChoiceConsider the reaction: A2 + B2 <--> 2AB. The reactants are mixed together, and the following is a plot of the reactant and the product concentrations with time. If at equilibrium, the concentration of A2 is 0.5 M, B2 is 0.5 M, and AB is 1.0 M, what is the value of the equilibrium constant K?
- Multiple ChoiceFor the reaction 2 R (g) ⇌ Q (g), if the equilibrium concentration of R is 0.776 M and that of Q is 1.22 M at 25 °C, what is the value of the equilibrium constant K at this temperature?