| A | B |
|---|
| ( s ) | solid |
| ( cr ) | crystal |
| ( l ) | liquid |
| ( g ) | gas |
| ( aq ) | aqueous solution |
| down arrow | solid precipitate product formed |
| up arrow | gaseous product formed |
| arrow pointed to right | yields or produces |
| two arrows pointed in opposite directions | reversible reaction |
| right arrow with a triangle | reactants are heated |
| right arrow with a pressure unit | pressure at which reaction is carried out |
| right arrow with a temperature unit | temperature at which reaction is carried out |
| right arrow with a chemical formula | catalyst is added to speed up reaction |
| right arrow with e- | electrolysis |
