U3-1-0 - N4 Revision Flashcards
1
Q
Metal + Oxygen → …
A
Metal oxide
2
Q
Metal + Water → …
A
Metal hydroxide + Hydrogen
3
Q
Metal + Acid → …
A
Salt + Hydrogen
4
Q
Chemical test for hydrogen gas
A
Burns with a (squeaky) pop
5
Q
Very reactive metals must be extracted from their ores via …
A
electrolysis.
6
Q
Metals around the middle of the ECS can be extracted from their ores via …
A
heating with carbon.
7
Q
Very unreactive metals can be extracted from their ores via …
A
heating alone.
8
Q
What type of metal pairs generate higher voltages in electrochemical cells?
A
Far apart in the ECS
9
Q
What is the direction of electron flow in electrochemical cells?
A
From metal higher in the ECS to metal lower in the ECS
Imagine electrons flowing down the ECS
