Acids, Alkalis And Redox Reactions 4.1.1 Flashcards
1
Q
What scale measures the acidity or alkalinity of a substance?
A
The pH scale.
2
Q
What ions do acids form when they are dissolved in water?
A
Hydrogen (H+) ions.
3
Q
What ions do alkalines form when they are dissolved in water?
A
Hydroxide (OH-) ions.
4
Q
What is an oxidation reaction?
A
A reaction in which oxygen is gained.
5
Q
What is a reduction reaction?
A
A reaction in which oxygen is lost.
6
Q
When a substance is oxidised, what happens to the number of electrons it has?
A
It decreases.
7
Q
When a substance is reduced, what happens to the number of electrons it has?
A
It increases.
8
Q
Mnemonic for electrons in redox reactions:
A
Oxidation Is Loss Reduction Is Gain
