ABSTRACT
Name Formula Step t/°C pKa Aluminum(III) ion Al+3 25 5.0 Ammonia NH3 25 9.25 Arsenic acid H3AsO4 1 25 2.26
2 25 6.76 3 25 11.29
Arsenious acid H2AsO3 25 9.29 Barium(II) ion Ba+2 25 13.4 Boric acid H3BO3 1 20 9.27
2 20 >14 Calcium(II) ion Ca+2 25 12.6 Carbonic acid H2CO3 1 25 6.35
2 25 10.33 Chlorous acid HClO2 25 1.94 Chromic acid H2CrO4 1 25 0.74
2 25 6.49 Cyanic acid HCNO 25 3.46 Germanic acid H2GeO3 1 25 9.01
2 25 12.3 Hydrazine N2H4 25 8.1 Hydrazoic acid HN3 25 4.6 Hydrocyanic acid HCN 25 9.21 Hydrofluoric acid HF 25 3.20 Hydrogen peroxide H2O2 25 11.62 Hydrogen selenide H2Se 1 25 3.89
2 25 11.0 Hydrogen sulfide H2S 1 25 7.05
2 25 19 Hydrogen telluride H2Te 1 18 2.6
2 25 11 Hydroxylamine NH2OH 25 5.94 Hypobromous acid HBrO 25 8.55 Hypochlorous acid HClO 25 7.40 Hypoiodous acid HIO 25 10.5 Iodic acid HIO3 25 0.78 Lithium ion Li+ 25 13.8 Magnesium(II) ion Mg+2 25 11.4 Nitrous acid HNO2 25 3.25 Perchloric acid HClO4 20 -1.6 Periodic acid HIO4 25 1.64 Phosphoric acid H3PO4 1 25 2.16
2 25 7.21
a 3 25 12.32
Phosphorous acid H3PO3 1 20 1.3 2 20 6.70
Pyrophosphoric acid H4P2O7 1 25 0.91 2 25 2.10 3 25 6.70 4 25 9.32
Selenic acid H2SeO4 2 25 1.7 Selenious acid H2SeO3 1 25 2.62
2 25 8.32 Silicic acid H4SiO4 1 30 9.9
2 30 11.8 3 30 12 4 30 12
Sodium ion Na+ 25 14.8 Strontium(II) ion Sr+2 25 13.2 Sulfamic acid NH2SO3H 25 1.05 Sulfuric acid H2SO4 2 25 1.99 Sulfurous acid H2SO3 1 25 1.85
2 25 7.2 Telluric acid H2TeO4 1 18 7.68
2 18 11.0 Tellurous acid H2TeO3 1 25 6.27
2 25 8.43 Tetrafluoroboric acid HBF4 25 0.5 Thiocyanic acid HSCN 25 –1.8 Water H2O 25 13.995
