test for gases Flashcards
1
Q
hydrogen
A
lit split in test tube = squeaky pop
2
Q
oxygen
A
glowing splint in test tube = the splint relights
3
Q
carbon dioxide
A
test tube with limewater = limewater turns cloudy
4
Q
ammonia
A
damp red litmus paper in ammonia gas goes blue
5
Q
chlorine
A
damp blue litmus paper in chlorine gas goes red then bleaches
6
Q
water - anhydrous copper sulphate
A
white to blue
7
Q
water - anhydrous cobalt chloride paper
A
blue to pink
8
Q
alkenes/alkanes
A
shake bromine water - alkanes no colour change - alkenes the bromine water turns colourless
9
Q
crystillasation
A
dip glass rod
