Studied by 13 people
Test for carbon dioxide
bubble through limewater if present
Test for hydrogen
-hold a lighted splint at the open end of a test tube of gas
creates a squeaky pop sound
Test for oxygen
place a glowing splint inside a test tube of gas
Test for chlorine
damp blue litmus paper will be bleached white
Colour of Li+ flame test
Red
Colour of Na+ flame test
Yellow
Colour of K+ flame test
Lilac
Colour of Ca 2+ flame test
orange-red
Colour of Cu 2+ flame test
blue-green
Metal ions produce a ...
colour if heated strongly in a flame
How do you carry out a flame test?
dip the loop of an unreactive metal in dilute acid
How can metal cations in aq solutions be identified?
by the colour of the precipitate they form on addition of sodium hydroxide
What forms a white precipitate with the addition of sodium hydroxide?
Calcium
What forms a blue precipitate with the addition of sodium hydroxide?
Copper (II)
What forms a green precipitate with the addition of sodium hydroxide?
Iron (II)
Orange-brown precipitate with the addition of sodium hydroxide?
Iron (III)
What do all carbonates contain?
the carbonate ion CO3 2-
What is released when carbonates react with dilute acids
carbon dioxide
How to test for carbonate ions?
add dilute acid then test the gas released
if a carbonate compound is present then fizzing should be seen and the gas produced is carbon dioxide which turns limewater cloudy when bubbled through
How to test for a sulfate ion?
acidify the sample with dilute hydrochloric acid
How to test for Halide ions?
add dilute nitric acid
Instrumental analysis
Faster More accurate Sensitive
The last peak of a mass spectrum tells us...
the relative formula mass of the compound
Note 
Flashcard (135)