Flashcards in Test for gases Deck (8)
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1
Hydrogen
Lighted splint / lit splint - squeaky pop when held above the mouth of the test tube
2
Oxygen
Glowing splint - relights
3
Carbon dioxide
Limewater - goes cloudy/milky (precipitate of calcium carbonate)
4
Ammonia
Damp red litmus paper / damp universal indicator paper - blue
Gives a dense white smoke with HCl gas from the stopper of a bottle of concentrated acid
5
Chlorine
Wet litmus paper - white / bleaches
6
Nitrogen dioxide
Purple acidified potassium mangnate (VII) - turns colourless
Damp blue litmus paper - red
7
Sulfur dioxide
Purple acidified potassium manganate (VII) - turns colourless
Acidified potassium dichromate (VI) - turns orange to green
Both are used soaked onto filter paper held in the gas
8
