Table comparing pH, hydrogen ion concentration, and acidity

pH [H+] Description Acidity in comparison to neutral
0
1.0
Extremely acidic 10,000,000 times stronger
1
0.1
Potent acid 1,000,000 times stronger
2
0.01
Very strong acid 100,000 times stronger
3
0.001
Strong acid 10,000 times stronger
4
0.0001
Acid
1000 times stronger
5
10-5
Weak acid
100 times stronger
6
10-6
Mild acid 10 times stronger
7
10-7
Neutral
Identical
8
10-8
Mild base 10 times weaker
9
 10-9
Weak base 100 times weaker
10
 10-10
Base 1000 times weaker
11
     10-11  
Strong base 
10,000 times weaker
12
10-12
Very strong base 100,000 times weaker
13
10-13
Potent base 1,000,000 times weaker
14
10-14
Extremely basic 10,000,000 times weaker

                        

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