What are the four (4) factors that can shift the position of an equilibrium? a. b. c. d.        Which can alter the value of the equilibrium constant?

7. What happens to a reaction at equilibrium when a product concentration is decreased? The reaction is unchanged. a) b) A catalyst is formed c) The reaction makes more reactants. d) The reaction makes more products. 8. What happens to a reaction at equilibrium when a reactant concentration is increased? a) b) c) d) The reaction is unchanged. A catalyst is formed The reaction makes more reactants. The reaction makes more products. 9. Consider the equilibrium Sa(s) + 8 O2(g) + 8 SO2(9) In which direction will this reaction move if more oxygen is added to the reaction vessel? we are not given enough information to determine the direction the reaction will move a) there will be no change in the position of the equilibrium b) c) I in the reverse direction d) in the forward direction 10. A catalyst is added to the equilibrium reaction: NH4CI(s) +→ NH3(g) + Cl2(0) The reaction will not return to equilibrium a) b) reach equilibrium faster c) produce more reactant d) produce more of the…

Which drawing represents this system some time later when no further change is evident (after equilibrium is reached)? а. b. с. d.

The equilibrium 2 SO2(g) + 02(g) 2 SO3(g) is important in atmospheric chemistry. According to LeChatelier's Principle, what happens to the concentration of O2(g) near a volcano when it emits SO2(g) prior to erupting? (consider only the equilibrium described.) a. the concentration of 02(g) is decreased because the equilibrium shifts to the right. b. the concentration of O2(g) is decreased because the equilibrium shifts to the left. C the concentration of O2(g) is increased because the equilibrium shifts to the right.