Topic 4 - Reactions Flashcards
What are the reactions of oxygen.
Respiration Rusting combustion
Test for hydrogen?
Squeaky pop
Test for oxygen?
Relighting a glowing splint
Test for carbon dioxide?
Limewater turning cloudy
Definition for catalyst?
A chemical that speeds up chemical reactions with out being used up
Examples of a catalyst?
Manganese dioxide(making oxygen) Enzymes Iron(making ammonia)
Uses of oxygen?
Breathing apparatus Welding Rocket fuel
Uses of carbon dioxide?
Fire extinguishers Fizzy drinks Dry ice
Uses of hydrogen?
Making margarine Rocket fuel Clean fuel
Definition of exothermic?
A reaction that gives out heat
Definition of endothermic?
Reaction that takes in heat
The temperature goes up when it is …
Exothermic
The temperature goes down when it is…
Endothermic
Example of an exothermic reaction?
Burning fuel
What happens during oxidation?
Oxygen added
What happens during reduction?
Oxygen removed
What is a redox reaction?
It is when oxidation and reduction are occurring in the same reaction
In this equation what had been reduced ? Copper oxide+carbon->copper+carbon dioxide
Copper oxide
In this equation what had been oxidised? Copper oxide+carbon->copper+carbon dioxide
Carbon
Example of a endothermic reaction?
Sherbet on tongue
Equation for hydrogen?
Magnesium+hydrochloric acid-> magnesium chloride+hydrogen
Equation for carbon dioxide?
Calcium carbonate+hydrochloric acid->calcium chloride+water+carbon dioxide
Evidence that chemical reaction has taken place?
Gives off gas Gives off heat Changes colour
Solvent
Liquid that dissolves in a solid solute
Solute
A solid that will dissolve is a solvent
Solution
A mixture of a solute and a solvent
what test is this diagram showing?
it is showing the oxygen test- relighting a glowing splint
what test is this diagram showing?
test for hydrogen - pop with lit splint
what test is this diagram showing?
carbon dioxide test -bubled through limewater it turns milky
