k = A e -E a /RT
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k = A e -E a /RT. Titration Curves. Weak acid with strong base:. Strong acid with weak base:. http://www.chemguide.co.uk/physical/acidbaseeqia/phcurves.html. Acid-base Equilibria. Important Equations:. Self-ionization of water:. H 2 O H + + OH - K w = [H + ][OH - ] = 1.0 x 10 -14. - PowerPoint PPT Presentation
Transcript of k = A e -E a /RT
k = Ae-Ea/RT
Titration Curves
Weak acid with strong base:
Strong acid with weak base:
http://www.chemguide.co.uk/physical/acidbaseeqia/phcurves.html
Acid-base EquilibriaImportant Equations:
Self-ionization of water:
H2O H+ + OH-
Kw = [H+][OH-] = 1.0 x 10-14
Acid dissociation:
HA H+ + A-
[HA]]-][A[H
aK
Base dissociation (e.g. NaOH, KOH):
BOH B+ + OH-
[BOH]]-][OH[B
bK
Base hydrolysis (e.g., NH3):
B + H2O BH+ + OH-
HA + H2O H3O+ + A-
[HA]]-][AO3[H
aK
[B]]-][OH[BH
bK
Acid-base Equilibria (cont’d)
Hydrolysis of the conjugate base of an acid:
In a buffer system:
]-[A[HA]][H aK
A- + H2O HA + OH-
]-[A]-[HA][OHbK
]-[A]-[HA][OH
[HA]]-][A[H
baKK
= [H+][OH-] = Kw
Note that:
]-[A
[HA] logppH aK
[HA]]-[A logppH aK