Chem 102 1st Edition Lecture 8 Outline of Last Lecture I. Acid and Base Equilibrium A. Bronsted- Lowry Acids and BasesB. pH ScaleC. Strong Acids/ BasesOutline of Current LectureI. Weak AcidsA. Polyprotic AcidsII. Weak BasesCurrent LectureI. Weak Acids- Only partially ionized in solutions. There is a mixture of ions and unionized acid in solution. Weak acids are in equilibrium, Ka is the acid dissociation constant. The larger the Ka, the stronger the acid. If Ka> 1 then the acid is completely ionized and the acid is a strong acid. -Weak acids are simply equilibrium calculations. The pH gives the equilibrium concentration of H+. Percent ionization can also be used to measure acid strength:100]HA[][Hionization %0eqm-The higher the percent ionization, the stronger the acid. Percent ionization of a weak acid decrease as the molarity of the solution increases. A. Polyprotic Acids- Have more than one ionizable proton. The protons are removed in different steps. The first polyprotic acid is easier to remove than the second, therefore Ka1>Ka2>Ka3. These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.II. Weak Bases- Bases generally have loan pairs or negative charges in order to attack protons. Most neutral weak bases contain nitrogen. The larger the Ka, the smaller the Kb. The stronger the acid, the weaker the conjugate
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