## Acids and Bases pka and pkb

CNourian2H
Posts: 106
Joined: Fri Aug 30, 2019 12:16 am

### Acids and Bases pka and pkb

Can someone explain the relation btwn pkA/pkB and how strong the acid/base is. If I have a higher pkB, does that mean I have a weaker base?

Hui Qiao Wu 1I
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am

### Re: Acids and Bases pka and pkb

The lower the pKb, the stronger the base. The lower the pKa, the stronger the acid.

Abhi Vempati 2H
Posts: 104
Joined: Fri Aug 09, 2019 12:17 am

### Re: Acids and Bases pka and pkb

Adding on to what @Hui Qiao Wu 1I mentioned, the lower the pka of an acid, the higher the pKb of its conjugate base. This is because of the equation pka + pKb = 14. Hope this helps!

Mariah
Posts: 104
Joined: Fri Aug 02, 2019 12:16 am

### Re: Acids and Bases pka and pkb

Abhi Vempati 2H wrote:Adding on to what @Hui Qiao Wu 1I mentioned, the lower the pka of an acid, the higher the pKb of its conjugate base. This is because of the equation pka + pKb = 14. Hope this helps!

14 is the same as p[sub]w right?

CNourian2H
Posts: 106
Joined: Fri Aug 30, 2019 12:16 am

### Re: Acids and Bases pka and pkb

Mariah wrote:
Abhi Vempati 2H wrote:Adding on to what @Hui Qiao Wu 1I mentioned, the lower the pka of an acid, the higher the pKb of its conjugate base. This is because of the equation pka + pKb = 14. Hope this helps!

14 is the same as p[sub]w right?

Yes, Pkw=14

Celine 1F
Posts: 120
Joined: Fri Aug 02, 2019 12:16 am

### Re: Acids and Bases pka and pkb

The lower the pKa, the stronger the acid. The lower the pKb, the stronger the base!

Simon Dionson 4I
Posts: 107
Joined: Sat Sep 14, 2019 12:17 am

### Re: Acids and Bases pka and pkb

the -log means that the higher the number, the lower the value. Higher numbers result in stronger acids/bases for pka and pkb.

ValerieChavarin 4F
Posts: 99
Joined: Wed Sep 18, 2019 12:18 am

### Re: Acids and Bases pka and pkb

A lower pKa indicates a stronger acid and a lower pKb is a stronger base, as pKa + pKb = 14

Nawal Dandachi 1G
Posts: 102
Joined: Sat Sep 28, 2019 12:16 am

### Re: Acids and Bases pka and pkb

a low pKa would indicate a strong acid whereas a low pKb would indicate a strong base