Kb = Kw/Ka = ?
Larger Kb means stronger base. I put in this extra step so as not to confuse Ka and Kb.
The weakest acid should be the strongest base.
Given the following acid dissociation constants, which acid has the strongest conjugate base?
a. HCN Ka = 6.2 x 10-10
b. HOCl Ka = 3.0 x 10-8
c. HIO3 Ka = 0.17
I believe the answer is HCN it has the lowest Ka and is the weakest acid.
3 answers
HCN Kb = 1.0 x 10^-14/6.2 x 10^-10 = 1.61 x 10^-5
HOCl Kb = 1.0 x 10^-14/3.0 x 0^-8 = 3.3 x 10^-7
HIO3 Kb = 1.0 x 10^-14/.17 = 5.88 x 10^-14
The strongest Kb appears to be HCN. Is this correct?
HOCl Kb = 1.0 x 10^-14/3.0 x 0^-8 = 3.3 x 10^-7
HIO3 Kb = 1.0 x 10^-14/.17 = 5.88 x 10^-14
The strongest Kb appears to be HCN. Is this correct?
Are you doing AP Chem? I can help
4 answers