tests for common gases+ions
- Created by: rxbyw
- Created on: 30-10-19 16:10
test for chlorine:
bleaches damp litmus paper turning it white
test for oxygen:
put a glowing splint inside a test tube containing the gas
if oxygen is present it will relight the glowing splint
test for hydrogen:
if you hold a lit splint at the open end of a test tube containing hydrogen you'll get a squeaky pop.
test for carbon dioxide:
if you bubble gas through calcium hydroxide(lime water) the solution will turn cloudy if theres carbon dioxide in the gas
the cloudiness is caused by the formation of calcium carbonate
tests for positive ions:
testing for metal ions-flame tests-
lithium ions give a crimson flame
sodium ions give a yellow flame
potassium ions give a lilac flame
calcium ions give an orange-red flame
copper ions give a green flame
to do the test you clean a nichrome wire loop by dipping it into hydrochloric acid and then holding it in the blue flame from a bunsen burner until it burns without any colour
dip the loop into the sample and put it back into the flame
record the colour
this test only tests for samples that contain a single metal ion
if the sample tested contains a mixture of…
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