Reactions Topic 1 Flashcards
How much oxygen is in the air
21%
How much nitrogen is in the air
78%
How much argon is in the air
0.9%
How much carbon dioxide is in the air
0.037
Reactions of oxygen
Respiration
Rusting
Combustion
Uses of oxygen
Breathing apparatus
Welding
Rocket fuel
What is a catalyst
Speeds up a chemical reaction without being used up e.g magnesium dioxide
Equation for finding oxygen
Magnesium dioxide
Hydrogen peroxide——————————>water + oxygen
Test for oxygen
Relights a glowing splint
Test for carbon dioxide
Turns limewater cloudy when bubbled into it
Uses for carbon dioxide
Fire extinguishers
Fizzy drinks
Dry ice
Equation for carbon dioxide
Calcium carbonate + hydrochloric acid -> calcium chloride +water + Carbon dioxide
Test for hydrogen
Burning splint makes squeaky pop
Uses for hydrogen
Margarine
Rocket fuel
Clean fuel
M.A.S.H
Metal + acid = salt + hydrogen
Equation for finding hydrogen
Magnesium+ hydrochloride acid -> magnesium chloride + hydrogen
Exothermic
A reaction that gives out heat
Endothermic
A reaction that takes heat
Oxidation
Oxygen is added
Reduction
Oxygen is taken away
Redox reaction
Reduction and oxidation taking place in the same reaction
Special ingredient in biological powders
Biological enzyme
In the thermite reaction the two reactants are
Iron oxide and aluminium
The thermite reaction is a very exothermic/endothermic reaction
Exothermic
The reactant ……………… is reduced to molten iron
Iron oxide
The thermite reaction is used to
Weld train tracks together
What colour is copper oxide
Black
What colour is carbon
Black
What do you see when you heat the mixture of copper oxide and carbon
It glows red/brown and on cooling we can see red/brown specs of copper
The equation for the reaction of mixture carbon and copper oxide
Copper oxide + carbon -> copper + carbon dioxide
What is the equation for a thermite reaction
Aluminium + iron oxide = iron + aluminium oxide
