AP QUIZZES - AP TOPIC 13 Equilibrium SET A
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QUESTION 1. What is true of any reversible reaction reaction that has reached equilibrium?

(A) More products will produced if the reaction is cooled
(B) Less products will be produced if the reaction is cooled
(C) All products and reactants will have the same concentrations
(D) There is a specific ratio of products to reactants at a specific temperature
(E) The forward and backward reactions are occuring at different speeds

QUESTION 2. When solid Sodium Carbonate reacts with aqueous HCl, which of the following statements about the Kc expression is correct?

(A) [CO2] will appear in the numerator
(B) [H2O]3 will appear in the numerator
(C) [CO2]2 will appear in the numerator
(D) [HCl]3 will appear in the denominator
(E) [HCl]2 will appear in the numerator

QUESTION 3. What would the units of Kc be for the following reaction?

CH4(g) + 3O2(g) <==> CO2(g) + 2H2O(g)


(A) M
(B) M2
(C) M-1
(D) M-2
(E) M3

QUESTION 4. A reaction is found to have an extremely large Kc = 4.1 x 1015. Which of the following statements cannot be determined from the value of the equilibrium constant?

(A) The reaction converts nearly all of the reactants to products
(B) The reaction will have a negative Delta G
(C) There will be high cocncentration of products at equilibrium
(D) The reverse reaction will have a very small Kc
(E) The forward reaction is very fast

QUESTION 5. In an gaseous, exothermic reaction, which of the following changes makes NO difference to the position of equilibrium?

(A) Change of temperature
(B) Adding more reactants
(C) Removing products
(D) Changing the volume
(E) Adding a catalyst




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