Calculate and apply the acid dissociation constant (Ka) and pKa to determine the difference between strong and weak acids Flashcards
1
Q
What is Ka?
A
Ka is an equilibrium constant that is used to determine the extent of dissociation of an acid in solution (e.g. water).
2
Q
What is the pKa formula?
A
pKa = -log10Ka
3
Q
What is the formula for Ka?
A
Ka = [H+] [A–] / [HA]
4
Q
What is the formula for Kb?
A
Kb = [BH+] [OH–] / [B] ; where B+ is the conjugate acid of base B
5
Q
What is the formula for Kw?
A
Kw = Ka x Kb = 1.0 x 10-14 (ONLY at 25 degrees celsius as Kw changes with temperature like all other equilibrium constant which we have explanation in the derivation of Keq section in Module 5 notes)
