C5 Chemical Changes Flashcards
1
Q
Describe what happens when a metal reacts with oxygen
A
It forms a metal oxide
Magnesium + Oxygen > Magnesium Oxide
2
Q
List the order of the reactivity series.
A
Potassium Sodium Calcium Magnesium Aluminium Carbon Zinc Iron Tin Lead Hydrogen Copper Silver Gold
3
Q
How are unreactive metals found?
A
They are found as metals in the Earth, in a pure form.
4
Q
What is the formula of magnesium oxide?
A
Magnesium + Oxygen > Magnesium Oxide
5
Q
What is the formula of calcium hydroxide?
A
Calcium Carbonate + Carbon Dioxide > Calcium Hydroxide + Water
6
Q
What ion is responsible for acidity?
A
Hydrogen
7
Q
What ion is responsible for alkalinity?
A
Hydroxide
8
Q
Is pH1 acid, alkali or neutral?
A
Acid
9
Q
Is pH7 acid, alkali or neutral?
A
Neutral
10
Q
Is pH14 acid, alkali or neutral?
A
Alkali
11
Q
Write the neutralisation equation.
A
Acid + Base > Salt + Water
