Weak acid, weak base

Acids = proton donors.
Weak acids - those that are not strong!
Weak acids do not ionize 100%.
Weak acids set up equilibrium with water to produce the acid's anion and hydronium ion.
If the general representation of a weak acid is HA, then in llbm:
HA(aq) + H2O <=>  H3O+(aq)  +  A-(aq)

Generally two question types are asked
(1) Determine the Ka value for a particular weak acid
   -given llbm information about [H3O+] via pH and/or %ionization information
   -where pH can be used to determine [H3O+] @ llbm
   -and where %ionization = [H3O+]llbm/[HA]  x 100%
(2) Determine pH (or % ionization) given specific acid(useKa chart to determine Ka value)

Complete mathematical solution would include:
-llbm equation
-Ka expression
-ICE chart
-solve for whatever it is that is being asked
     -looking for pH or %ionizn?
     -solve for [H3O+]llbm, then calculate to get requested info
     -looking for Ka, use pH or %ionzn to determine [H3O+]

Weak bases - similar set up as with weak acids
Difference, weak bases involve [OH-], which leads to pOH

If the geneal formula for a weak base is 'Base' and bases are proton acceptors
Generally: Base(aq)  +  H2O  <=>  BaseH+(aq)   +   OH-(aq)
Again given two basic question types
(1) Determine pH of a stated basic solution.
(2) Determine Kb of a stated base.

Complete mathematical solution would include:
    -llbm equation
    -Kb expression
    -ICE chart
    -solve for whatever it is that is being asked
         -looking for pH?
             -solve for [OH-]llbm , then determine pOH, then pH
              @25C pH  + pOH = 14.00
         -looking for Kb use given pH (or pOH) to get to [OH-]llbm

Homework:
p568(8) p570(10)  p574(12,13)  p579(1,3,13)
Next up?
Using the Ka/Kb chart to calculate K values of conjugate ions
KaKb = Kw

Cute joke coming, ready? Why did the chicken cross the playground? [Ans: To get to the other slide.]