Organic Chem pka values

H2SO4 Sulfuric Acid

Pka = -9

Protonated carbonyl, ketones, aldehydes, esters

Pka = - 7

H in HCl

Pka = -7

H in H3O+

Pka = -1.74

H in -COOH carboxylic acid

pka = around 5

H in C - C2O2 , 2 carbonyl group

Pka = 9

H in Phenol group ( a ring and -OH )

Pka = 10

H in water H2O

Pka = 15.7 or 16

H in -OH alcohol linear carbon chain

Pka = 16

H in -OH with substitutued C or branch

Pka = 18

H in keton- CH3

Pka = 19

H in Alkyne triple bond

Pka = 25

H in NH3

Pka = 38

H in C2H4 alkene

Pka = 44

H in -C2H6 alkane

Pka = 50

H-H

pka = 36

H in ring-NH(+)

pka = 6

H in NH4(+)

pka = 9

Cyclohexenone

pka = 16.7 - 20

pka = 38

Cyclohexanone

pka = 20-24

Cyclopentanol

pka = 16

pka = 9

Ester

pka = 25

-NH2 , amine proton

pka = 38