Acid and alkalis, paper 1 Flashcards
1
Q
Ph1
A
Red
2
Q
pH 2
A
Red/orange
3
Q
PH 3
A
Orange
4
Q
PH 4
A
Dark yellow
5
Q
PH 5
A
Yellow light almost hint of green
6
Q
PH 6
A
Light green
7
Q
PH 7
A
Green
8
Q
PH 8
A
Dark green
9
Q
PH 9
A
Turquoise
10
Q
PH 10
A
Light blue
11
Q
PH 11
A
Blue
12
Q
PH 12
A
Navy blue
13
Q
PH 13
A
Very dark blue/ purpleish
14
Q
PH 14
A
Purple
15
Q
Methanol orange in acid
A
Red
16
Q
Methanol orange in neutral
A
No change, orange.
17
Q
Methanol orange in alkali
A
Orange.
18
Q
Phenolphthalein in acid
A
Colourless
19
Q
Phenolphthalein in neutral
A
No change, colourless
20
Q
Phenolphthalein in alkali
A
Pink
21
Q
Acid + metal =
A
salt + hydrogen
22
Q
Metal carbonate + acid =
A
Salt + water + carbon dioxide
23
Q
Acid + alkali/base =
A
Salt + water
24
Q
Acid + alkali =
A
Salt + water
25
Titration
To find out how much acid it takes for neutralise an amount of alkali to end point.
26
Salt that are solvable in water:
```
All nitrates
Most chlorides
Most sulphites
Sodium...
potassium..
ammonium...
```
27
Salts that are insoluble in water
```
Most carbonates
Most hydroxides
Lead...
silver chloride
Barium sulphate
Calcium sulphate
```
28
In all acids:
H+ ion
29
In all alkali’s
OH- ion
30
Strength of a acid or alkali
Is determined by how many H+ or OH- ions they have to dissociate.
31
Concentration =
Solute / solvent.
32
CO2 test
Limewater, goes cloudy or bubbles
33
Hydrogen test
Lit splint over a test tube hear a pop.
