Distilled water

Sodium chloride

Sodium hydroxide

Dilute ethanoic acid

Reacts with ammonium salt to produce salt, water and ammonia gas

Reacts with acid to produce salt and water

Reacts with metal ion to produce insoluble metal hydroxide and cation from alkali

Reacts with metal to produce insoluble metal hydroxide and cation from alkali

Test the gas with glowing wooden splinter

Test the gas with lighted wooden splinter

Test the gas with a moist red litmus paper

Flow the gas into lime water.

$2H_2+O_2\rightarrow\ 2H_2O$

$2H_2O\ \rightarrow\ 2H_2+O_2$

$H_{ }^++OH_{ }^-\rightarrow H_2O$

$H_2O\ \rightarrow\ H_{ }^++OH_{ }^-$

Iron(III) sulphate

Sodium sulphate

Sodium hydroxide

Iron(III) hydroxide

Has sweet smell

pH more than 7

brown colour gas

Turns blue litmus paper to red