tests for gases

chlorine test use what

damp blue litmus paper

if chlorine present

the litmus paper will bleach white

sometimes before litmus paper will go red before white why?

chlorine reacts with water and forms hydrochloric acid

oxygen test uses a

glowing splint

is oxygen is present what will happen and why

the splint will relight as oxygen is a reactant in the combustion reaction

hydrogen test uses a

lit splint

if hydrogen is present

water will form and there will be a squeaky pop

where is the squeaky pop from and how does that form water

the hydrogen rapidly burning with oxygen from the air forming water

carbon dioxide test uses

limewater ( aqueous calcium hydroxide)

if carbon dioxide is present when you bubble carbon dioxide through limewater it will

turn cloudy