Tests For Gases

Question	Answer
Ammonia NH3 Colourless pungent smell	Test - hold damp red litmus paper (or UDI) in gas Result- indicator paper turns blue
Carbon Dioxide CO2 colourless and oudourless	Test- bubble through limewater (calcium hydroxide solution) Result- white ppt of calcium carbonate formed (solution turns milky)
Chlorine Cl2 pale green, choking smell	Test- hold damp litmus paper or UDI in gas Result- indicator bleached white, blue litmus will turn red first then become bleached
Hydrogen H2 colourless , odourless	Test- hold a lighted splint in gas Result- hydrogen burns with a squeaky pop
Oxygen O2 colourless, odourless	Test- hold a 'glowing' wooden splint in gas Result- the splint re-lights

Resource summary

	Created by Safiya Caesar over 11 years ago