What Factors Would Affect The Equilibrium Constant For The Reaction Above? (Select All That Apply.)

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Question 1

Which one of the following statements regarding a dynamic equilibrium is false?

a) At equilibrium, there is no net change in the system

b) At equilibrium, the concentration of reactants and products stays the same

c) At equilibrium, the forward and back reactions cease to occur

d) At equilibrium, the rates of the forward and back reactions are identical

Question 2

At equilibrium, the concentrations of the reactants and products will be equal. True or false?

a) True

b) False

Question 3

Consider the reaction 2H₂ + O₂ 2H₂O. Which of the following correctly states the expression for the equilibrium constant for this reaction?

Question 4

A large value of K tells us which of the following?

a) The reaction lies to the left

b) The reaction lies in the middle

c) The reaction lies to the right

Question 5

The value of the equilibrium constant, K, depends on the temperature at which the reaction is happening. True or false?

a) True

b) False

Question 6

Consider the binding of a protein and its ligand, represented by the expression P + L ?PL. Which of the following statements in relation to this binding process is true?

a) The expression for the dissociation constant, K _d, is

b) A small value of K _d tells us that the protein and ligand bind tightly.

c) If binding is strong, the association reaction lies to the left.

d) If binding is weak, the dissociation reaction lies to the left.

Question 7

Consider the binding of oxygen to haemoglobin: Hb + O₂ Hb-O. If we decrease the pressure of the system, what is the effect on this equilibrium reaction?

a) The equilibrium shifts to the left

b) The equilibrium shifts to the right

c) There is no change in the system

Question 8

Which one of the following statements regarding chemical equilibria is false?

a) Catalysts do not alter the position of equilibrium: they do not shift the equilibrium to the left or right

b) At equilibrium, G = 0

c) If G for a reaction is negative, the forward reaction happens spontaneously

d) If the equilibrium constant is very large, G is positive

Question 9

Increasing the temperature of the surroundings shifts the position of equilibrium in favour of exothermic reactions. True or false?

a) True

b) False

Question 10

The free energy change under standard conditions (G) is related to the equilibrium constant by the van't Hoff isotherm: G = -RTlnK. But what does the symbol R represent?

a) The entropy of the system

b) The gas constant

c) The Avogadro constant

d) The reaction quotient