ch2 Flashcards
(25 cards)
how much oxygen is in the air
21%
how much nitrogen is in the air
78%
how much other gases are there in the air
1%
uses of oxygen
welding torches, rocket fuel, breathing aparatus
respiration equation
glucose+oxygen=carbon dioxide+water+energy
rust equation
iron+water+oxygen=hydrated iron oxide
burning fuel equation
fuel+oxygen=carbon dioxide+water+energy
what are most fuels
hydrocarbons
what are reactions using oxygen called
oxidation reactions
how to test for water
anyhydrous copper sulfate from white to blue
how to test for carbon dioxide
turns limewater milky
how to prepare oxygen
add 5cm3 of hydrogen peroxide to side arm test tube
add some hydrogen dioxide to the test tube
remove test tube of oxygen from water when full
uses for catylist
dna replication, speeding up reactions, digestions
hydrogen uses
making margarine,clean fuel, rocket fuel
how to prep hydrogen
add 5cm3hydrochloric acid to side arm test tube
add small peice of magnesium collect gas
prep hydrogen word equation
magnesium + hydrochloric acid = magnesium chloride + hydrogen
uses of carbon dioxide
fizzy drinks, dry ice, fire extinguisher
prep carbon dioxide word equation
calcium carbonate + hydrochloric acid = calcium chloride + water + carbon dioxide
prep carbon dioxide
5cm3 hydrochloric acid into side arm test tube
adda few granules of calcium carbonate into test tube
collect gas
exothermic
gives out heat
endothermic
takes in heat
oxidation
produces oxygen
reduction reaction
takes in oxygen
reducing agent
a substance which reduces another substance
