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• at an even higher oxidation state, the suffix “-ic”,

• at the highest oxidation state the prefix “-per” and the suffix “-ic”. For

+1
example: Cl , HClO – hypochlorous acid,
+3
Cl , HClO 2 – chlorous acid,
+5
Cl , HClO 3 – chloric acid,
+7
Cl , HClO 4 – perchloric acid.
If the acid consists of two or more atoms of the acid forming element to denote

their amount in the acid name, then the prefix corresponding to Greek numerals is

used. For example: H 2Cr 2O 7 - dichromic acid, H 4P 2O 7 - diphosphoric acid, H 2B 4O 7

- tetraboric acid.

For the two acids of the same anhydride, which differ in water content, the

names are formed as follows: to the name of an acid anion with a lower water

content the prefix “-meta” is added, with the higher water content - the prefix “-
orto”.

For example: P 2O 5 + H 2O = 2HPO 3 methaphosphoric acid,
P 2O 5 + 3H 2O = 2H 3PO 4 orthophosphoric acid,

B 2O 3 + H 2O = 2HBO 2 metaboric acid,
B 2O 5 + 3H 2O = H 3BO 3 orthoboric acid.

The names of some oxygen-containing acids are given in supplement G.

Chemical properties of acids

1 Interaction with bases and amphoteric hydroxides:

HBO 2 + NaOH = NaBO 2 + H 2O

3H 2SO 4 + 2Cr(OH) 3 = Cr 2(SO 4) 3 + 6H 2O

2 Interaction with basic and amphoteric oxides:

2HClO 2 + CaO = Ca(ClO 2) 2 + H 2O

6HNO 3 + Fe 2O 3 = 2Fe(NO 3) 3 + 3H 2O

3.4 Salts

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