pH of Acids - Sorted by pH
|
Acid
|
Name
|
1 mM
|
10 mM
|
100 mM
|
|
H2SO4
|
sulfuric
acid
|
2.75
|
1.87
|
1.01
|
|
HI
|
hydroiodic
acid
|
3.01
|
2.04
|
1.08
|
|
HBr
|
hydrobromic
acid
|
3.01
|
2.04
|
1.08
|
|
HCl
|
hydrochloric
acid
|
3.01
|
2.04
|
1.08
|
|
HNO3
|
nitric
acid
|
3.01
|
2.04
|
1.08
|
|
H3PO4
|
orthophosphoric
acid
|
3.06
|
2.26
|
1.63
|
|
H3AsO4
|
arsenic
acid
|
3.08
|
2.31
|
1.70
|
|
H2CrO4
|
chromic
acid
|
3.03
|
2.33
|
2.06
|
|
HF
|
hydrofluoric
acid
|
3.27
|
2.65
|
2.12
|
|
HNO2
|
nitrous
acid
|
3.28
|
2.67
|
2.13
|
|
HCyanate
|
isocyanic
acid, HOCN
|
3.35
|
2.76
|
2.23
|
|
HFormate
|
formic
acid, CH2O2 (methanoic acid)
|
3.47
|
2.91
|
2.38
|
|
H2MoO4
|
molybdic
acid
|
3.46
|
2.94
|
2.43
|
|
HLactate
|
lactic
acid, C3H6O3 (milk acid)
|
3.51
|
2.96
|
2.44
|
|
HAcetate
|
acetic
acid, C2H4O2 (ethanoic acid)
|
3.91
|
3.39
|
2.88
|
|
H3Citrate
|
citric
acid, C6H8O7
|
4.18
|
3.90
|
3.57
|
|
H2CO3
|
carbonic
acid
|
4.68
|
4.18
|
3.68
|
|
H2S
|
hydrogen
sulfide
|
4.97
|
4.47
|
3.97
|
|
H3AsO3
|
arsenious
acid
|
6.07
|
5.58
|
5.09
|
|
HCyanide
|
hydrocyanic
acid, HCN
|
6.11
|
5.62
|
5.12
|
|
H3BO3
|
boric
acid
|
6.12
|
5.62
|
5.12
|
|
H4SiO4
|
silicic
acid
|
6.40
|
5.91
|
5.42
|
|
H4SiO4
|
silicic
acid (with SiO2(a) precipitation)
|
6.40
|
6.26
|
6.26
|
hhhhhh
|
pH of Acids - Sorted by Molecular Formula
|
Acid
|
Name
|
1 mM
|
10 mM
|
100 mM
|
|
H2CO3
|
carbonic
acid
|
4.68
|
4.18
|
3.68
|
|
H2CrO4
|
chromic
acid
|
3.03
|
2.33
|
2.06
|
|
H2MoO4
|
molybdic
acid
|
3.46
|
2.94
|
2.43
|
|
H2S
|
hydrogen
sulfide
|
4.97
|
4.47
|
3.97
|
|
H2SO4
|
sulfuric
acid
|
2.75
|
1.87
|
1.01
|
|
H3AsO3
|
arsenious
acid
|
6.07
|
5.58
|
5.09
|
|
H3AsO4
|
arsenic
acid
|
3.08
|
2.31
|
1.70
|
|
H3BO3
|
boric
acid
|
6.12
|
5.62
|
5.12
|
|
H3Citrate
|
citric
acid, C6H8O7
|
4.18
|
3.90
|
3.57
|
|
H3PO4
|
orthophosphoric
acid
|
3.06
|
2.26
|
1.63
|
|
H4SiO4
|
silicic
acid
|
6.40
|
5.91
|
5.42
|
|
H4SiO4
|
silicic
acid (with SiO2(a) precipitation)
|
6.40
|
6.26
|
6.26
|
|
HAcetate
|
acetic
acid, C2H4O2 (ethanoic acid)
|
3.91
|
3.39
|
2.88
|
|
HBr
|
hydrobromic
acid
|
3.01
|
2.04
|
1.08
|
|
HCl
|
hydrochloric
acid
|
3.01
|
2.04
|
1.08
|
|
HCyanate
|
isocyanic
acid, HOCN
|
3.35
|
2.76
|
2.23
|
|
HCyanide
|
hydrocyanic
acid, HCN
|
6.11
|
5.62
|
5.12
|
|
HF
|
hydrofluoric
acid
|
3.27
|
2.65
|
2.12
|
|
HFormate
|
formic
acid, CH2O2 (methanoic acid)
|
3.47
|
2.91
|
2.38
|
|
HI
|
hydroiodic
acid
|
3.01
|
2.04
|
1.08
|
|
HLactate
|
lactic
acid, C3H6O3 (milk acid)
|
3.51
|
2.96
|
2.44
|
|
HNO2
|
nitrous
acid
|
3.28
|
2.67
|
2.13
|
|
HNO3
|
nitric
acid
|
3.01
|
2.04
|
1.08
|
|
pH of Bases - Sorted by pH
The
limited solubility of hydroxides is taken into account (as indicated by
footnotes in the last column).
|
Base
|
Name
|
1 mM
|
10 mM
|
100 mM
|
|
|
Ba(OH)2
|
barium
hydroxide
|
11.27
|
12.22
|
13.11
|
|
|
Sr(OH)2
|
strontium
hydroxide
|
11.27
|
12.22
|
13.09
|
|
|
NaOH
|
sodium
hydroxide
|
10.98
|
11.95
|
12.88
|
|
|
KOH
|
potassium
hydroxide (caustic potash)
|
10.98
|
11.95
|
12.88
|
|
|
Na2SiO3
|
sodium
metasilicate
|
11.00
|
11.91
|
12.62
|
|
|
Ca(OH)2
|
calcium
hydroxide (lime, CaO:H2O)
|
11.27
|
12.20
|
12.46
|
|
|
Na3PO4
|
trisodium
phosphate
|
10.95
|
11.71
|
12.12
|
|
|
K2CO3
|
potassium
carbonate
|
10.52
|
11.00
|
11.36
|
|
|
Na2CO3
|
sodium
carbonate (soda ash)
|
10.52
|
10.97
|
11.26
|
|
|
NH4OH
|
ammonium
hydroxide (NH3:H2O)
|
10.09
|
10.61
|
11.12
|
|
|
Mg(OH)2
|
magnesium
hydroxide (MgO:H2O)
|
10.40
|
10.40
|
10.40
|
|
|
CaCO3
|
calcium
carbonate (calcite)
|
9.91
|
9.91
|
9.91
|
|
|
Cu(OH)2
|
copper(II)
hydroxide
|
8.56
|
9.14
|
9.72
|
|
|
Fe(OH)2
|
iron(II)
hydroxide (ferrous hydroxide)
|
9.45
|
9.45
|
9.45
|
|
|
Na2B4O7
|
sodium
borate (borax)
|
9.21
|
9.17
|
9.05
|
|
|
Zn(OH)2
|
zinc
hydroxide
|
8.88
|
8.88
|
8.88
|
|
|
Ni(OH)2
|
nickel(II)
hydroxide
|
8.37
|
8.37
|
8.37
|
|
|
KAcetate
|
potassium
acetate (CH3COOK)
|
7.87
|
8.33
|
8.75
|
|
|
NaAcetate
|
sodium
acetate (CH3COONa)
|
7.87
|
8.33
|
8.75
|
|
|
KHCO3
|
potassium
hydrogen carbonate
|
8.27
|
8.25
|
8.13
|
|
|
NaHCO3
|
sodium
hydrogen carbonate
|
8.27
|
8.22
|
8.02
|
|
|
Pb(OH)2
|
lead(II)
hydroxide
|
7.54
|
7.54
|
7.54
|
|
|
Cr(OH)3
|
chromium(III)hydroxide
|
7.04
|
7.04
|
7.04
|
|
|
|
pH of Bases - Sorted by Molecular Formula
|
|
|
Base
|
Name
|
1 mM
|
10 mM
|
100 mM
|
|
|
Ba(OH)2
|
barium
hydroxide
|
11.27
|
12.22
|
13.11
|
|
|
Ca(OH)2
|
calcium
hydroxide (lime, CaO:H2O)
|
11.27
|
12.20
|
12.46
|
|
|
CaCO3
|
calcium
carbonate (calcite)
|
9.91
|
9.91
|
9.91
|
|
|
Cr(OH)3
|
chromium(III)hydroxide
|
7.04
|
7.04
|
7.04
|
|
|
Cu(OH)2
|
copper(II)
hydroxide
|
8.56
|
9.14
|
9.72
|
|
|
Fe(OH)2
|
iron(II)
hydroxide (ferrous hydroxide)
|
9.45
|
9.45
|
9.45
|
|
|
K2CO3
|
potassium
carbonate
|
10.52
|
11.00
|
11.36
|
|
|
KAcetate
|
potassium
acetate (CH3COOK)
|
7.87
|
8.33
|
8.75
|
|
|
KHCO3
|
potassium
hydrogen carbonate
|
8.27
|
8.25
|
8.13
|
|
|
KOH
|
potassium
hydroxide (caustic potash)
|
10.98
|
11.95
|
12.88
|
|
|
Mg(OH)2
|
magnesium
hydroxide (MgO:H2O)
|
10.40
|
10.40
|
10.40
|
|
|
Na2B4O7
|
sodium
borate (borax)
|
9.21
|
9.17
|
9.05
|
|
|
Na2CO3
|
sodium
carbonate (soda ash)
|
10.52
|
10.97
|
11.26
|
|
|
Na2SiO3
|
sodium
metasilicate
|
11.00
|
11.91
|
12.62
|
|
|
Na3PO4
|
trisodium
phosphate
|
10.95
|
11.71
|
12.12
|
|
|
NaAcetate
|
sodium
acetate (CH3COONa)
|
7.87
|
8.33
|
8.75
|
|
|
NaHCO3
|
sodium
hydrogen carbonate
|
8.27
|
8.22
|
8.02
|
|
|
NaOH
|
sodium
hydroxide
|
10.98
|
11.95
|
12.88
|
|
|
NH4OH
|
ammonium
hydroxide (NH3:H2O)
|
10.09
|
10.61
|
11.12
|
|
|
Ni(OH)2
|
nickel(II)
hydroxide
|
8.37
|
8.37
|
8.37
|
|
|
Pb(OH)2
|
lead(II)
hydroxide
|
7.54
|
7.54
|
7.54
|
|
|
Sr(OH)2
|
strontium
hydroxide
|
11.27
|
12.22
|
13.09
|
|
|
Zn(OH)2
|
zinc
hydroxide
|
8.88
|
8.88
|
8.88
|
|
|
http://www.aqion.de/site/191http://www.genchem.com/pdf/sodaashtech.pdf
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