The Air Flashcards
Fire triangle:
Oxygen, heat, fuel
How to put out a fire:
Remove an element from fire triangle
Products of complete combustion:
Carbon dioxide, water
Products of incomplete combustion:
Carbon monoxide (CO), carbon, water
Oxidation:
When a substance gains oxygen in a reaction
Combustion:
Burning in oxygen to react with oxygen
Test for carbon dioxide
Bubble through limewater, turns cloudy
Test for water
Anhydrous cobalt chloride paper turns from blue to pink
How is an oxide formed?
When an element burns in oxygen
What is the reaction called when oxides are formed?
Oxidation reaction because the element gains oxygen
Properties of non metal oxides:
Acidic, exist as gases
Properties of metal oxides:
Alkaline, exist as solids
Method of finding % of oxygen in the air by using phosphorus:
Heat phosphorus so it reacts with oxygen
As oxygen in the air is used up the water level rises in the bell jar
Rises by 21% because air is 21% oxygen
Method of finding % of oxygen in the air by using copper:
Forms copper oxide
Copper (pink, brown) gets black layer
Gains mass
Removes oxygen from air
Oxidation reaction
Number of passes increases, volume of oxygen decreases
Two observations of magnesium reacting with oxygen:
Bright white flame
Solid white powder (magnesium oxide) forms
Magnesium+ oxygen- magnesium oxide
