Oxy-Acid
Polyatomic Ion

Acid

Has an
Acid
Salt

Example

Perchlorate ClO4-1
Chlorate ClO3-1
Chlorite ClO2-1
Hypochlorite ClO-1

Perchloric acid HClO4 (aq)
Chloric Acid HClO3 (aq)
Chlorous Acid HClO2 (aq)
Hypochlorous Acid HClO (aq)

N/A .

Persulfate SO5-2
Sulfate SO4-2
Sulfite SO3-2
Hyposulfite SO2-2

Persulfuric Acid H2SO5 (aq)
Sulfuric Acid H2SO4 (aq)
Sulfurous Acid H2SO3 (aq)
Hyposulfurous Acid H2SO2 (aq)

*

Sodium bisulfate NaHSO4

Percarbonate CO4-2

Carbonate CO3-2
Carbonite CO2-2
Hypocarbonite CO-2

Percarbonic acid H2CO4 (aq)
Carbonic Acid H2CO3 (aq)
Carbonous Acid H2CO2 (aq)
Hypocarbonous acid H2CO (aq)

*

potassium bicarbonate KHCO3

Pernitrate NO4-1
Nitrate NO3-1
Nitrite NO2-1
Hyponitrite NO-1

Pernitric Acid HNO4 (aq)
Nitric Acid HNO3 (aq)
Nitrous Acid HNO2 (aq)
Hyponitrous acid HNO (aq)

N/A .

Perphosphate PO5-3

Phosphate PO4-3
Phosphite PO3-3
Hypophosphite PO2-3

Perphosphoric Acid H3PO5 (aq)

Phosphoric Acid H3PO4 (aq)
Phosphorus Acid H3PO3 (aq)
Hypophosphorus Acid H3PO2 (aq)

* *

calcium monohydrogen phosphate CaHPO4
sodium dihydrogen phosphate
NaH2PO4

Acetate CH3COO-1

Acetic Acid CH3COOH

N/A .

Permanganate MnO4-1

xxxx
N/A .

Chromate CrO4-2

xxxxx
N/A .

Dichromate Cr2O7-2

xxxxx
N/A .