01:160:162 Lecture 22: Ksp and Molar Solubility

93 views3 pages

ivoryant268

25 Jul 2017

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Solubility rules (of ionic compounds in water) allow us to determine ionic compound"s water solubility. Compounds were categorized as either soluble or insoluble. But there are degrees of solubility sparingly soluble, etc. Quantifying solubility of sparingly soluble compound ksp. Sparingly soluble ionic compounds can dissolve in water to some extent. Dissolution of an ionic compound is an equilibrium process. Extent of dissolution can be quantified by an equilibrium constant ex. Solubility of caf2 (s) in water can be represented by: Caf2 (s) ca2+ (aq) + 2 f- (aq) Caf2 (s) + h2o (l) ca2+ (aq) + 2 f- (aq) or. Note** water may or may not be shown in overall reaction. Equilibrium constant for this reaction has a very specific name and equilibrium expression: Remember** pure solids and h2o (l) don"t show up in equilibrium expression. Ksp is a rough measure of compound"s solubility.

Related Questions

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 K_c 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 K_c = 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.”)

orchidworm772

Answer the following questions:

01:160:162 Lecture 22: Ksp and Molar Solubility

Document Summary

Get access

Related Documents

01:160:162 Lecture Notes - Lecture 4: Francium, Electron Pair, Ammonium Chloride

01:160:162 Lecture Notes - Lecture 14: Lead, Magnesium Fluoride, Equilibrium Constant

01:160:162 Lecture Notes - Lecture 24: Silver Iodide, Lewis Acids And Bases, Lead

Related Questions