Gases of the air - Oxygen and the combustion of elements Flashcards
Explain combustion
This is a reaction that occurs when a substance reacts rapidly with oxygen to form an oxide. [ burning ]
What is air: a molecule, an atom, a mixture or a compound
a mixture
Air is a gas, so particles move _________ and __________.
quickly , randomly
What is the word and symbol equation when a reaction that occurs when a substance reacts rapidly with oxygen to form an oxide.
Word equation : Magnesium + oxygen ——-> magnesium oxide
Symbol equation : 2 Mg + O2 ——–> 2 MgO
What was the magnesium’s change in appearance after combustion?
Changes from a shiny metal [ silver ] to white powder.
How do you know that this combustion reaction is a chemical reaction?
The appearance to the product looks different, exothermic reaction, bright white light.
What is the word and symbol equation for proving the percentage of oxygen in air?
Word equation : Copper + oxygen —–> copper (II) oxide
Symbol equation : 2Cu + O2 —-> 2CuO
The colour of the copper metal before heating is?
Pink metal
The colour of the copper (II) oxide powder after heating is?
Black
How does air expand?
When it is heated.
Sulphur + oxygen ——>?
Sulphur oxide
Carbon + oxygen —–>?
Carbon oxide
What is the word when a substance was produced during a chemical reaction?
Product
What is the word for a chemical reaction where a substance reacts with oxygen?
oxidation
What is the word when a type of compound was produced during combustion?
Oxide
