Solved: Many molecules with central atoms from Period 3 or

Chapter 18, Problem 18.151

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Many molecules with central atoms from Period 3 or higher take part in Lewis acid-base reactions in which the central atom expands its valence shell. SnCl4 reacts with (CH3)3N as follows: CaCO3(s)H3O (aq) BA Ca2 (aq)HCO3 ?(aq)H2O(l) PCO2 H2CO3(aq) H2O(l) BA HCO3 ?(aq) H3O(aq) CO2(g) H2O(l) BA H2CO3(aq) 828 Chapter 18 Acid-Base Equilibria beaker A is at equilibrium. Calculate Q for B, C, and D to determine which, if any, is also at equilibrium. (b) For any not at equilibrium, in which direction does the reaction proceed? (c) Does dilution affect the extent of dissociation of a weak acid? Explain. + Sn Cl N C H (a) Identify the Lewis acid and the Lewis base in the reaction. (b) Give the nl designation of the sublevel of the central atom in the acid before it accepts the lone pair. 18.152