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SCH4U Unit #2: EQUILIBRIUM . Ms. Cornacchione Wed Mar 19 th 2014. AGENDA. Test 3 – Equilibrium Part 1 Continue with Acid-Base Equilibrium Notes and Examples. Unit #2: Acid/Base Equilibrium TOPICS. Bronsted Lowry Acids & Bases (8.1) Strong and Weak Acids & Bases (8.2)

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sch4u unit 2 equilibrium

SCH4UUnit #2: EQUILIBRIUM

Ms. Cornacchione

Wed Mar 19th 2014

agenda
AGENDA
  • Test 3 – Equilibrium Part 1
  • Continue with Acid-Base Equilibrium Notes and Examples
unit 2 acid base equilibrium topics
Unit #2: Acid/Base EquilibriumTOPICS
  • Bronsted Lowry Acids & Bases (8.1)
  • Strong and Weak Acids & Bases (8.2)
  • Acid Calculations (8.4)
  • Base Calculations
  • Acid-Base Properties of Salts
  • Acid-Base Titration
  • Buffer Systems
acid calculations
Acid Calculations
  • Strong acids (ionize completely)
    • Can assume [H+] = [HA(aq)] to calculate pH
  • Weak acids (ionize partially)
    • Must consider EQM (Initial, Change, and EQM Concs) and Ka, to calculate pH
  • Percent Ionization – percentage of solute that ionizes when it dissolves in a solvent
examples calc ph from k a
EXAMPLES – Calc pH from Ka

(TIP: Use an ICE Table)

polyprotic acids
Polyprotic Acids

Monoprotic acids – possesses only one ionizable (acidic) hydrogen atom (eg. HCl(aq))

Polyprotic acids – possesses more than one ionizable (acidic) hydrogen atom (eg. H2SO4(aq))

H2A ⇌ H+ + HA- Ka1= [H+][HA-]

[H2A]

HA-⇌ H+ + A- Ka2 = [H+ ][A-]

[HA- ]

practice makes perfect
Practice Makes Perfect!!
  • Page 525 Q#1-9
  • Complete the “Acid-Base EQM” Worksheet
unit 2 acid base equilibrium topics1
Unit #2: Acid/Base EquilibriumTOPICS
  • Bronsted Lowry Acids & Bases (8.1)
  • Strong and Weak Acids & Bases (8.2)
  • Acid Calculations (8.4)
  • Base Calculations (8.5)
  • Acid-Base Properties of Salts
  • Acid-Base Titration
  • Buffer Systems
base calculations
Base Calculations
  • Strong bases (ionize completely)

pH + pOH = 14

  • Weak bases (ionize partially)
    • Must consider EQM and Kb, to calculate pOH
unit 2 acid base equilibrium topics2
Unit #2: Acid/Base EquilibriumTOPICS
  • Bronsted Lowry Acids & Bases
  • Strong and Weak Acids & Bases
  • Acid Calculations
  • Base Calculations
  • Acid-Base Properties of Salts
  • Acid-Base Titration
  • Buffer Systems
acid base properties of salt solutions
Acid-Base Properties of Salt Solutions
  • Many salts are highly soluble in water and easily dissociate into ions that may or may not change the pH of the solution (acidic, basic, or neutral)
  • We must consider how well each ion acts as an acid or a base (the stronger one wins!)
practice makes perfect1
Practice Makes Perfect
  • Complete all Section 8.6 Practice Problems
  • Do Page 539 Q#2-5