Question

a. Write the reaction representing the dissolution of the "insoluble" salt, Ag2 CrO4 in water. b. Write the equilibrium constant expression for this salt. c. Discuss the implications on the solubility of the salt (think about Le Chatelier's principle) when dissolving this salt in an aqueous solution of 0.10 M AgNO3 instead of pure water. d. Write the equilibrium constant expression for this salt dissolved in 0.10 M. AgNO3.

Answer 1

@ ciates as follows: Ag, cro4 dissociates as follows: As, cтo4 = 2 Ast Стоа 2- 6 I Equilibrium constant for above reaction is- k - [Agt] [crou + [ Ag cr04] k. [Ag, crow] & [Agt] [crou .. (Ksp = [Ag+7² [ cror] @ silver chromate (Ag₂ cro4) is a sparingly soluble salt. It has a sparingly solubility product Ksp = 1,2 x 10-12 "Le chateljer's principle is used to discuss whether the reaction equilibrium will shifted to right hand or left hand le. Whether the reaction is going to forward direction or reverse direction..

According to common ion effect a chemical Solution in which several species reversibly associate with each other by an equilibrium process, increasing the concentration of any one of its dissociated components of any by adding another chemical that also / Contains it will cause an increased amount of association. Equilibrium dissolved in constant constant 0.1 M expression expression AGNO, is for as this salt follows: Ag₂ cr 04 (6) 2 Agtrag) + crou aq ANG - Agt + No Here Agt is a common in in both so when Ag Noz is added the equibrium in silver chromate goes to left hand side ie. dissociation of Ag cron is suppresed. Ksp = [Agt] [ crom? -] = (25)² xs = 4 3 Now [cron ] 5 4 [A ] : S = Given- 0.1 MAI NO3 je [494], 0.1 Given - = 2.6*10-12 . Ksp - [AgtJ² [crou ? - (0.12 x 2.6x10 Ksp = 2.6x16Tom