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pKa values

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Total cards: 20•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (20)

#1
Front (Question)

A stronger acid has a ? pka? A better leaving group has a ? pKaH?

Back (Answer)

Stronger acid → lower pH → higher Ka → lower pKa Lower pKaH → leaving group has a stronger conjugate acid → better leaving group The pKaH is the pKa of the leaving group’s conjugate acid. So an acid’s pKa = its base’s pKaH.

#2
Front (Question)

for all following acids and pka values, remember that the pka of acid = pkah of conjugate base

Back (Answer)

#3
Front (Question)

HI

Back (Answer)

-10

#4
Front (Question)

HCl

Back (Answer)

-7

#5
Front (Question)

H2SO4

Back (Answer)

-3

#6
Front (Question)

H3O+

Back (Answer)

-1.7

#7
Front (Question)

HSO4-

Back (Answer)

2

#8
Front (Question)

carb acids

Back (Answer)

~5

#9
Front (Question)

H2S

Back (Answer)

7

#10
Front (Question)

HCN

Back (Answer)

9.1

#11
Front (Question)

NH4+

Back (Answer)

9.2

#12
Front (Question)

phenol

Back (Answer)

10

#13
Front (Question)

H2O

Back (Answer)

15.7

#14
Front (Question)

ethanol

Back (Answer)

15.9

#15
Front (Question)

ketones

Back (Answer)

~20

#16
Front (Question)

alkynes

Back (Answer)

~24

#17
Front (Question)

ammonia/amines

Back (Answer)

~33

#18
Front (Question)

H2

Back (Answer)

35

#19
Front (Question)

benzene

Back (Answer)

43

#20
Front (Question)

alkanes

Back (Answer)

48-60