2.
4.
Molecule
ion
ion
Many molecules break
HCl
Molecule
CH3COOH
Molecule
NaOH
Many molecules
don’t break
1.
7.
pH paper
= other molecules
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
H+
pH meter
NH3
H+
H+
H+
H+
H+
H+
H+
VERY ACIDIC
small pH
H+
VERY ALKALINE
BIG pH
3.
5.
Logarithmic scale
The pH scale
0
1
2
3
4
5
6
The substance is 100
times more acidic.
6.
ACID
ALKALI
Hydrogen ion
7
8
9
10
11
12
13
14
The substance is 1000
times more alkaline.