CHEM 231 pKas

Question 1

Hydroiodic acid

Answer 1

-10 (HI)

Question 2

Hydrochloric acid

Answer 2

-8 (HCl)

Question 3

Benzenesulfonic acid

Answer 3

-6.5 (Benzene attached to SO3H)

Question 4

Sulfuric acid

Answer 4

-3 (H2SO4)

Question 5

Hydronium ion

Answer 5

-1.7 (H3O+)

Question 6

Hydrofluoric acid

Answer 6

3.2 (HF)

Question 7

Hydrogen sulfide

Answer 7

7 (H2S)

Question 8

Hydrogen cyanide

Answer 8

9.3 (HCN)

Question 9

Methanethiol

Answer 9

10.3 (CSH)

Question 10

Methanol

Answer 10

16 (COH)

Question 11

Ammonia

Answer 11

36 (NH3)

Question 12

Alkene

Answer 12

~~43 (ring with one double bond)

Question 13

Hydrobromic acid

Answer 13

-9 (HBr)

Question 14

Conjugate acid of acetic acid

Answer 14

-6 (Carbon attached to a protonated carbonyl group bonded to an OH)

Question 15

Conjugate acid of dimethyl ether

Answer 15

-3.5 (OH+ between carbon groups)

Question 16

Conjugate acid of ethanol

Answer 16

-2.4 (OH2+ attached to carbons)

Question 17

Nitric acid

Answer 17

-1.5 (HNO3)

Question 18

Acetic acid

Answer 18

5 (OH attached to carboxyl group attached to carbon groups)

Question 19

Ammonium ion

Answer 19

9.3 (NH4+)

Question 20

Phenol

Answer 20

10 (Benzene ring with OH)

Question 21

Water

Answer 21

15.7 (H2O)

Question 22

Alkyne

Answer 22

25 (Hydrogen off of a triple bond)

Question 23

Hydrogen gas

Answer 23

40 (H2)

Question 24

Alkane

Answer 24

~~60 (Hydrogen off of a Carbon Carbon single bond)