Test for gases Flashcards Preview

A Level Chemistry > Test for gases > Flashcards

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

Hydrogen chloride

Aqueous silver nitrate - white precipitate
NH3 - gives a dense white smoke