Writing Formulae
Writing formulae
In Introducing Physical and Chemical Change, we learnt about the writing of chemical formulae. The table below shows some of the common anions and cations that you should know.
|
Name of compound ion |
formula |
Name of compound ion |
formula |
|
Acetate (ethanoate) |
\(\text{CH}_{3}\text{COO}^{-}\) |
Manganate |
\(\text{MnO}_{4}^{2-}\) |
|
Ammonium |
\(\text{NH}_{4}^{+}\) |
Nitrate |
\(\text{NO}_{3}^{-}\) |
|
Carbonate |
\(\text{CO}_{3}^{2-}\) |
Nitrite |
\(\text{NO}_{2}^{-}\) |
|
Chlorate |
\(\text{ClO}_{3}^{-}\) |
Oxalate |
\(\text{C}_{2}\text{O}{4}^{2-}\) |
|
Chromate |
\(\text{CrO}_{4}^{-}\) |
Oxide |
\(\text{O}_{2}^{-}\) |
|
Cyanide |
\(\text{CN}^{-}\) |
Permanganate |
\(\text{MnO}_{4}^{-}\) |
|
Dihydrogen phosphate |
\(\text{H}_{2}\text{PO}_{4}^{-}\) |
Peroxide |
\(\text{O}_{2}^{2-}\) |
|
Hydrogen carbonate |
\(\text{HCO}_{3}^{-}\) |
Phosphate |
\(\text{PO}_{4}^{3-}\) |
|
Hydrogen phosphate |
\(\text{HPO}_{4}^{3-}\) |
Phosphide |
\(\text{P}^{3-}\) |
|
Hydrogen sulphate |
\(\text{HSO}_{4}^{-}\) |
Sulphate |
\(\text{SO}_{4}^{2-}\) |
|
Hydrogen sulphite |
\(\text{HSO}_{3}^{-}\) |
Sulphide |
\(\text{S}^{2-}\) |
|
Hydroxide |
\(\text{OH}^{-}\) |
Sulphite |
\(\text{SO}_{3}^{2-}\) |
|
Hypochlorite |
\(\text{ClO}^{-}\) |
Thiosulphate |
\(\text{S}_{2}\text{O}_{3}^{2-}\) |
Table: Table showing common compound ions and their formulae
This lesson is part of:
Bonding and Atomic Combinations