6. What happens to a reaction when Q K? A. Reaction shifts to the left to make m
ID: 704843 • Letter: 6
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6. What happens to a reaction when Q K? A. Reaction shifts to the left to make more reactant. B. Reaction shifts to the right to make more products. C. Reaction do not shift shifts to the right or left Answer: 7. What happens to a reaction equilibrium when a catalyst is added? A. Reaction shifts to the left to make more reactant. B. Reaction shifts to the right to make more products. C. Reaction do not shift shifts to the right or left Answer: In an endothermic reaction when temperature is increased what will be the effect on the K value? A. Higher K value B. Lower K value C. Unchanged K value 8.Explanation / Answer
6. When Q=K, the ratio of products and reactants has reached the equilibrium constant value. So, the reaction will not shift to the right or left (C).
7. When a catalyst is added to a reaction equilibrium, it affects the rate of forward and backward reaction to the same extent and hence has no effect on overall position of the equilibrium. So, on adding catalyst, the reaction does not shift to the right or left (C).
8. In an endothermic reaction if the temperature is increased, it will favor the reaction and hence there be Higher value of K according to Le Chatelier's principle(A).
4. If temeprature is increased in an exothermic reaction, reaction will proceed in reverse direction to decrease temperature and reaction will shift to the left to make more reactants ccording to Le Chatelier's principle(A).
5. If pressure is decreased, then the equilibrium will move in such a way that the pressure increases again. It can do that by producing more molecules. In this case, the position of equilibrium will move towards the left-hand side of the reaction. (A).
3. When reactants are added, there is an increase in reactant concentration, so, the reaction will shift towards right to produce more product and counter that change according to Le Chatelier's principle. (B)
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