Pka Values Test Questions – Flashcards

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question

HClO4


ClO4 

answer
–10


question
HI
(hello)

I
answer
–10

question
RCH(=O+H)
(protonated aldehyde)

RCH(=O)
(aldehyde) 
answer
–10


question
H2SO4
(sulfuric acid)

HSO4
answer

–10

 

 

question
HBr


Br
answer

–9

 

question
HCl


Cl
answer
–7 

question

R2C(=O+H)
(protonated ketone)

R2C(=O)

(ketone) 

answer

–7

 

 

question
ArSO3H


ArSO3
answer
–6.5

question

RC(=O+H)OR'
(protonated ester)

 

RC(=O)OR'
(ester)

answer

–6

 

 

question

R—O+HR'
(protonated ether)

R—O—R'

(ether) 

answer

–3.5

 

question

ROH2+
 
(protonated alcohol)

 

ROH

(alcohol)

 

answer

–2

 

 

question

H3O+



H2O 

answer
–1.7

question

HNO3

 

 

NO3 

answer

–1.4

 

question
HSO4


SO42– 
answer

2

 

 

question

HF

 


F 

answer

3.1

 

 

question
ArNH3+
(protonated aniline)

ArNH2
(aniline)
answer
4

question
RC(=O)OH
(carboxylic acid)

RC(=O)O
answer
5

question
H2CO3


HCO3 
answer
6.4

question
H2S


HS
answer
7
question
ArSH
(thiophenol)

ArS
answer
7


question
MeC(=O)CH2C(=O)Me
(acetylacetone) / (hacac) 

MeCOCHCOMe
(acac)
answer
9 
question
HCN


CN
answer

9.2

 

 

question
NH4+


NH3 
answer

9.2

 


 

question
ArOH
(phenol)

ArO
answer

10

 

 

question
R—CH2—NO2


R—CH—NO2
answer

10

 

question
RNH3+


RNH3
answer
11
question
RSH


RS
answer
11
question
MeC(=O)CH2C(=O)OMe
(methyl acetoacetate)

MeC(=O)CHC(=O)OMe
answer
11
question
CH3OH


CH3O
answer
15.2
question
H2O


HO
answer
15.7
question
RCH2—OH
(primary alcohol)

RCH2—O
answer
16
question
R2CH—OH
(secondary alcohol)

R2CH—O

answer
17
question
R3C—OH
(tertiary alcohol)

R3C—O 
answer
17
question

MeC(=O)NH2
(acetamide)

 

MeC(=O)NH 

answer
17
question
MeC(=O)CH3
(ketone)

MeC(=O)CH2
answer
20
question

MeOC(=O)CH3
(ester)

 

MeOC(=O)CH2 

answer
24
question
R—CH2—CN


R—CH—CN
answer
25
question

RCCH
(terminal alkyne)

 

RCC 

answer
25
question
H2


H
answer
35
question
NH3


NH2
answer
38
question

Ph—CH3
(toluene)

 

Ph—CH2 

answer
40
question
C6H6
(benzene)

C6H5
answer
43
question
CH2=CH2


CH2=CH
answer
44
question
CH4


CH3
answer
48
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