Ch5 Chemical changes Flashcards
1
Q
Redox reactions
A
OILRIG
oxidation is loss
reduction is gain
… of electrons
2
Q
metal + oxygen
A
metal oxide
3
Q
reduction
A
loss of oxygen
4
Q
oxidation
A
gain of oxygen
5
Q
Reactivity series
A
Please Potassium Stop Sodium Lovingly Lithium Calling Calcium Me Magnesium A Aluminium Careless Carbon Zebra Zinc Instead Iron Try Tin Learning Lead How Hydrogen Copper Copper Saves Silver Gold Gold
6
Q
Extraction of metals
A
Extracted from the earth as metal oxides
Reduced by carbon to form pure metals
- less reactive metals are displaced by carbon
7
Q
Displacement Reaction
A
More reactive metal displaces a less reactive metal from an aqueous solution
8
Q
metal + acid
A
salt + hydrogen
9
Q
weak acid
A
partially ionises in water to produce H+ ions
10
Q
strong acid
A
completely ionises in water to produce H+ ions
11
Q
alkalis
A
metal hydroxides
12
Q
Bases
A
metal oxides
metal carbonates
include alkali - metal hydroxides
13
Q
neutralisation reaction
A
acid + base -> salt + water
14
Q
salts
A
metal + base
15
Q
acid + metal carbonate
A
salt + water + carbon dioxide
