CHEM 1AA3 Lecture Notes - Buffer Solution, Conjugate Acid, Acid Strength

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1AA3
• Professor: Pippa Lock

Document Summary

Bl acid h+ donor, bl base h+ acceptor. Strong acids/bases 100% ionization in water. Weak acids/bases equilibrium reaction with water (ka and kb values: weak acid ka < 1, pka > 1, weak base kb < 1, pkb > 1. Ph + poh = 14 = pka + pkb. Ph of salt acidic (nh4cl), neutral (libr), basic (nach3coo) A solution of a weak acid or weak base initially contains a second source of one of the ions produced in the ionization of the acid or base. The added ions are said to be common to the weak acid or base. Nach3coo na+ + ch3coo: when a salt supplies the common ion ch3coo-, the equilibrium shifts to form more ch3cooh. Solutions of weak bases and their salts: ex. + + cl: when a salt supplies the common anion nh4. +, the equilibrium shifts to form more nh3.