Question

In Lab 4, Qualitative Analysis, students used Le Chatelier's Principle to separate Ag.Pb2+ and Hg2+. A separation reaction is shown below, with the equilibrium constant of the reaction. AgCl(s) + 2NH3(aq) -- Ag(NH3)2+(aq) + (4) K-3.01 X 10-9 > 0 (a) The K value indicates that the products are preferred. (1) Which of the following actions will result in more dissolution of the solid? (Select all that apply) adding a cooling adding NH3 heating (c) Which of the following actions will result in more precipitation of the solid? (Select all that apply.) heating cooling adding NH3 adding a

Answer 1

Answer 4470 means it is an endothermic reaction. so heat is consumed during dissolution of Agel. [Ag (NH3)+] [-] = 0.00301 << 1 :. [Nha] [A7 (NH) ][4-7 So reactants are favoured [NH₃]² As it is an endothermic reaction therefore addition of heat will shift the equilibrium towards product in accordance with Le-chatelier principle. Similarly, addition of NH3 will shift the equilibrium ..

owards product in Le-chatelier accordance with Principle. Correct options : adding NH₃ heating Similarly as above will favour formation Addition of ce- also cooling the temperature of more Agel solid. favour formation of more Agce cooling adding a correct options: