10
substance characteristics
the substance was heated and then placed in an ice bath.
the substance was in a salt solution of 2m and later placed in a
solution of 4m to cause a reaction.
the substance was hammered and broken into pieces.
which statement explains the treatments?
3
substance 1 was activated by a decrease in temperature, substance 2 was activated by the change in concentration, and
substance 3 decreased the surface area.
substance 1 was activated by a decrease in temperature, substance 2 was activated by the change in pressure, and
substance 3 increased the surface area.
substance 1 was activated by the heat and inactivated by ice, substance 2 was activated by the change in pressure, and
substance 3 decreased the surface area.
substance 1 was activated by the heat and inactivated by ice, substance 2 was activated by the change in concentration,
and substance 3 increased the surface area.

Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic