C5 Chemical Changes Flashcards
1
Q
Metal + acid ——–>
A
Salt + Hydrogen
2
Q
Oxidation
A
Loss of electrons
3
Q
Reduction
A
Gain of electrons
4
Q
Redox Reaction
A
When metal atoms loose electrons (oxidation) and hydrogen ions from the acid gain electrons (reduction).
5
Q
Metal Ore
A
Used to extract metals
6
Q
List Un-Reactive Metals
A
Copper, Silver, Gold
7
Q
List Very Reactive Metals (Explosive/dangerous)
A
Potassium, Sodium, Lithium
8
Q
Potassium Oxide + Zinc —–>
A
No Reaction. (This is because Potassium is more reactive so can’t be displaced.)
9
Q
Iron Oxide + Calcium —->
A
Calcium Oxide + Iron. (Calcium is more reactive so displaces iron.)
10
Q
Test for ‘Hydrogen’
A
Squeaky Pop Test
11
Q
Test for ‘Carbon Dioxide’
A
Turns limewater to cloudy white.
