Gas Chemistry Flashcards
What are the main components of the atmosphere?
About 78% nitrogen, about 21% oxygen, about 0.03-0.04% carbon dioxide, about 1% argon, small proportions of other noble gases, and varying proportions of water vapour.
What is the physical property of nitrogen that contributes to its lack of reactivity?
Nitrogen has a triple covalent bond, which contributes to its lack of reactivity.
How is nitrogen used in food packaging?
Nitrogen is used as a coolant and in food packaging.
What is the test for ammonia?
The test for ammonia involves using a glass rod dipped in concentrated hydrochloric acid. This will form white smoke of ammonium chloride.
What is ammonia used for in agriculture?
Ammonia is used in the manufacture of fertilisers by its reaction with acids.
How is hydrogen prepared in the laboratory?
Hydrogen is prepared using zinc (or other suitable metal) and hydrochloric acid.
What are some physical properties and uses of hydrogen?
Hydrogen is used in weather balloons, hardening oils, and has potential as a clean fuel.
How is oxygen prepared in the laboratory?
Oxygen is prepared by the catalytic decomposition of hydrogen peroxide.
What are some physical properties and uses of oxygen?
Oxygen is used in medicine and welding.
What is the reaction of carbon, sulfur, magnesium, iron, and copper with oxygen?
These elements react with oxygen to form products that can be classified as acidic or basic.
How is carbon dioxide gas prepared in the laboratory?
Carbon dioxide gas is prepared using calcium carbonate and hydrochloric acid.
What are some uses of carbon dioxide?
Carbon dioxide is used in fizzy drinks and fire extinguishers.
What reaction occurs when carbon dioxide reacts with water?
Carbon dioxide reacts with water to produce carbonic acid.
What happens when carbon dioxide reacts with calcium hydroxide (limewater)?
Carbon dioxide reacts with calcium hydroxide until carbon dioxide is in excess.
What gases should be investigated for their preparation, properties, tests, and reactions?
The gases to be investigated are hydrogen, oxygen, and carbon dioxide.
