C2.9 Gas Chemistry Flashcards
List the 4 properties of Nitrogen
Colourless gas
Same density as air
Diatomic N2
Unreactive
List 2 uses of nitrogen
Coolant
Food packaging
List 3 uses of ammonia
Fertilizer
Nitric Acid
Nylon
What is the test for ammonia and what is the observation if present?
Dip glass rod in concentrated hydrochloric acid and put this in sample of the gas
If present, white smoke of ammonium chloride is observed
What are the 4 properties of hydrogen?
Colourless, odourless gas
Insoluble
Less dense than air
Diatomic h2
What are the 3 uses of hydrogen?
Weather balloons
Hardening oils
Clean fuel
What is the test for hydrogen and what is the result if it is present?
Place lit splint into collected gas
If H2 present, squeaky pop
What are the 4 properties of Oxygen?
Colourless odourless gas
Soluble
Same density as air
Diatomic O2
What are the 2 uses of oxygen?
Welding
Oxygen masks
What is the test for oxygen and what will be the result if oxygen is presnet?
Apply glowing splint
If present, splint will relight
What are the 3 observations in the test for oxygen?
Gas bubbles
Heat gave off
Manganese remains
What are the 3 properties of CO2?
Colourless odourless gas
Heavier than air
Soluble
What are the 3 uses of CO2?
Fire extinguishers
Fizzy drinks
Dry ice
What is the test for CO2 and what are the results if it is present?
Pass gas through limewater
If co2 present lime water changes from clear to milky
In the test for CO2, what will happen if their is an excess amount of CO2
Lime water will turn clear again.
