Tests for Gases and Water Flashcards
(7 cards)
1
Q
chlorine test
A
- chlorine bleaches damp blue litmus paper, turning it white
- it may turn red for a moment first though, because a solution of chlorine is acidic
2
Q
oxygen test
A
oxygen relights a glowing splint
3
Q
carbon dioxide test
A
- carbon dioxide turns limewater cloudy
- bubble the gas through a test tube of limewater
4
Q
hydrogen test
A
hydrogen makes a squeaky pop with a lighted splint
5
Q
ammonia test
A
ammonia turns damp red litmus paper blue
6
Q
water test 1
A
- add anhydrous copper(II) sulphate to water
- if it changes from white to blue it is positive for water
NOTE: this will tell you water is present but not how pure it is
7
Q
water test 2
A
pure water will always boil at 100 degrees C and freeze at 0 degrees C
