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The Atmosphere

Revision of Oxygen and Carbon Dioxide chapters

QuestionAnswer
What percentage of the atmosphere is oxygen? 21%
Name the chemical required to show the presence of carbon dioxide in the air. Limewater
Name the chemical used to test for water vapour in the atmosphere. Cobalt Chloride Paper or Anhydrous Copper Sulphate
Which gas occupies approximately 78% of the earth's atmosphere? Nitrogen
Name the two chemicals needed to prepare oxygen in the lab. Hydrogen Peroxide and Manganese Dioxide
What is the test for oxygen gas? Relights a glowing splint.
What is the pH of oxygen gas? 7
Name the compound formed when magnesium is burned in oxygen. Magnesium Oxide
Name the compound formed when charcoal (carbon) is burned in oxygen. Carbon Dioxide
Name the two chemicals needed to prepare carbon dioxide in the lab. Hydrochloric Acid and Marble Chips
In the preparation of oxygen, which chemical is the catalyst? Manganese Dioxide
Give the scientific name for marble chips. Calcium Carbonate
What is the test for carbon dioxide? Turns limewater milky
List some uses of carbon dioxide. Fire extinguishers, Fizzy drinks and 'Dry Ice' used in stage effects
If you put red and blue litmus papers into a jar of Carbon Dioxide, what would you see? Red would stay red and blue would turn red
Created by: joeykenn