Question

Question #347fb

Answer 1

Symbols are written in parentheses to the right of the reactants and products in a chemical equation to indicate whether they are solids, liquids, gases, aqueous, or a precipitate. The symbols are as follows:
(s) means solid (also frequently used for precipitates)
(l) means liquid
(g) means gas
(aq) means aqueous (meaning dissolved in water)
(`darr`) means a preciptate

Examples
1) Aqueous silver nitrate plus aqueous sodium chloride react to produce aqueous sodium nitrate and solid silver chloride (silver chloride as a precipitate).

`AgNO_3`(aq) + `NaCl`(aq) `rarr` `NaNO_3`(aq) + `AgCl`(s)
Since the product `AgCl` is a precipate, it could also be written as `AgCl`(`darr`)

2) Methane gas plus oxygen gas react to produce carbon dioxide gas and liquid water.

`CH_4`(g) + `2O_2`(g) `rarr` `CO_2`(g) + `2H_2O`(l)

3) Solid copper metal plus aqueous silver nitrate react to produce solid silver metal plus aqueous copper(II) nitrate.

`Cu`(s) + `2AgNO_3`(aq) `rarr` `2Ag`(s) + `Cu(NO_3)_2`(aq)