C4 Chemical Changes Flashcards
1
Q
What happens during a displacement reaction?
A
A more reactive metal displaces a less reactive metal.
2
Q
What is OILRIG?
A
Oxidation is loss of electrons, Reduction is gaining electrons.
3
Q
What are the products of a neutralisation reaction?
A
Salt and water.
4
Q
What are the pHs of acids?
A
0-6
5
Q
What is the pH of a neutral solution?
A
7
6
Q
What is the pH scale of an alkali?
A
8-14
7
Q
What is a strong acid?
A
A strong acid completely dissociates when dissolved in solution. E.g. hydrochloric acid.
8
Q
What is a weak acid?
A
Weak acids only partially dissociate when dissolved in solution. E.G. ethanoic acid.
9
Q
What is an anode?
A
A positive electrode. Attract the cation (+)
10
Q
What is a cathode?
A
A negative electrode. Attract Anions (-)
11
Q
A
