Can anyone tell me how you would test for oxides of sulphur and nitrogen dioxide? I've searched on chemguide and Google, but didn't find anything. I know you use glowing splint for oxygen and limewater for carbon dioxide, but I'm stuck on these two gases.
Oxides of sulfur:
- Have no color
- Turn damp blue litmus paper red
- Have a choking, lung-catching smell
turns filter paper soaked in orange potassium dichromate(VI) solution green without the deposition of Sulfur, which is what H2
S does. I don't know about a specific test
, although I know lots of things it can do, just not on the scale of testing.
has a very characteristic brown color which darkens on heating, and if, when it is dissolved in water and ammonium chlorde is added, a gas (which is N2
- you can test for that too as it does gives a negative result for every single test that I know of!) is evolved, then it is definately NO2
. If you still aren't 100% sure its NO2
for whatever reason then you can always check its not bromine as it will do nothing when it is dissolved in water and AgNO3(aq)
is added. (Bromine would give cream precipitate).
has a choking smell, it certainly won't make you smile, let alone laugh!