Silver chloride, AgCl(s), is an “insoluble” strong electrolyte. (a) Write the equation for the dissolution of AgCl(s) in H2O(l). (b) Write the expression for Kc for the reaction in part (a). (c) Based on the thermochemical data in Appendix C and Le Châtelier’s principle, predict whether the solubility of AgCl in H2O increases or decreases with increasing temperature. (d) The equilibrium constant for the dissolution of AgCl in water is 1.6 × 10-10 at 25 °C. In addition, Ag+(aq) can react with Cl-(aq) according to the reaction
Ag+(aq) + 2 Cl-(aq) 
AgCl2 –(aq)
where Kc = 1.8 × 105 at 25 °C. Although AgCl is “not soluble” in water, the complex AgCl2- is soluble. At 25 °C, is the solubility of AgCl in a 0.100 M NaCl solution greater than the solubility of AgCl in pure water, due to the formation of soluble AgCl2- ions? Or is the AgCl solubility in 0.100 M NaCl less than in pure water because of a Le Châtelier-type argument? Justify your answer with calculations. (Hint: Any form in which silver is in solution counts as “solubility.”)
Silver chloride, AgCl(s), is an “insoluble” strong electrolyte. (a) Write the equation for the dissolution of AgCl(s) in H2O(l). (b) Write the expression for Kc for the reaction in part (a). (c) Based on the thermochemical data in Appendix C and Le Châtelier’s principle, predict whether the solubility of AgCl in H2O increases or decreases with increasing temperature. (d) The equilibrium constant for the dissolution of AgCl in water is 1.6 × 10-10 at 25 °C. In addition, Ag+(aq) can react with Cl-(aq) according to the reaction
Ag+(aq) + 2 Cl-(aq) AgCl2 –(aq)
where Kc = 1.8 × 105 at 25 °C. Although AgCl is “not soluble” in water, the complex AgCl2- is soluble. At 25 °C, is the solubility of AgCl in a 0.100 M NaCl solution greater than the solubility of AgCl in pure water, due to the formation of soluble AgCl2- ions? Or is the AgCl solubility in 0.100 M NaCl less than in pure water because of a Le Châtelier-type argument? Justify your answer with calculations. (Hint: Any form in which silver is in solution counts as “solubility.”)
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