C6: Acids, Bases and Salts Flashcards
1
Q
Alkali ions
A
OH-
2
Q
Acid ions
A
H+
3
Q
pH of pure water
A
pH 7
4
Q
Salt
A
A compound formed when some or all of the hydrogen in an acid is replaced by a metal.
5
Q
Acid + Metal ->
A
Salt + Hydrogen
6
Q
Acid + Base ->
A
Salt + Water
Neutralisation reaction
7
Q
Acid + Alkali ->
A
Salt + Water
Neutralisation reaction
8
Q
Precipitate
A
An insoluble solid formed by a reaction taking place in a solution.
9
Q
How are precipitation reactions used?
A
To remove pollutants from the waste water produced by factories.
To remove metal ions from industrial waste water.
Remove unwanted ions from drinking water.
10
Q
Acid + Metal Carbonate ->
A
Salt + Water + CO2
11
Q
Test for CO2
A
Limewater solution.
12
Q
How to carry out a Titration
A
- Measure a known volume of alkali into a flask using a volumetric pipette. Measure from the bottom of the Meniscus.
- Add a few drops of indicator (phenolphthalein- Pink in alkali, colourless in acid)
- Pour acid into a Burette. Drop into alkali until alkali changes colour.
- Measure how much acid it took, an repeat until you get two identical results.
13
Q
Where does the alkali go in a Titration?
A
The flask.
14
Q
sums to remember
A
conc = mol/ vol and mol = mass/ Mr
