University College - Chemistry Chem 112A Study Guide - Midterm Guide: Calorimetry, Calorimeter, Ideal Gas
14 Aug 2018
School
Department
Professor
Document Summary
Heterogeneous equilibria: ax (s) a+ (aq) + x- (aq: treated like any equilibria, dynamic: rate of dissolving = rate of re-perception, a solution of undissolved ions in equilibrium with the undissolved salt is called a saturation solutions. The dissolution of a slightly soluble salt: ax (s) a+ (aq) + x- (aq, ax2 (s) a2+ (aq) + 2x- (aq, a2x (s) 2a+ (aq) + x2- (aq) Ksp= [a+]2[x2-: adding h2o causes more ions to re-precipitate (more solid formed, adding more solid no change on concentrations. Salts have varying solubility and can be divided into 3 categories. If s < 0. 10 g/l insoluble : all salts are technically soluble. If 0. 10 g/l < s < 10. 0 g/l slightly soluble . If s > 10. 0 g/l soluble: not really ideal as ion pairs and clusters will form in solution. + salts, cl-, br-, and i- salts (except when associated with ag, Hg, or pb: salts associated with no3, so4.
