pHÂ P010
- A measure of the acidity or the alkalinity of a fluid. The scale ranges from 0 (acid) to 14 (alkali) with 7 considered neutral.
- The definitions of weak and strong acids, and weak and strong bases do not refer to pH, but instead describe whether an acid or base ionizes in solution.
- Finding good sealing materials can be difficult on both ends of the pH scale.
- Be aware that these numbers are exponents to the base 10. This means that a pH of 8 is ten times more alkali than a pH of 7.
- Here are som common pH values
ACID |
SOLUTION |
pH |
Acetic |
N |
2.4 |
Acetic |
0.1N |
2.9 |
Acetic |
0.01N |
3.4 |
Alum |
0.1N |
3.2 |
Arsenious |
saturated |
5.0 |
Benzoic |
0.01N |
3.1 |
Boric |
0.1N |
5.2 |
Carbonic |
saturated |
3.8 |
Citric |
0.1N |
2.2 |
Formic |
0.1N |
2.3 |
Hydrochloric |
N |
0.1 |
Hydrochloric |
0.1N |
1.1 |
Hydrochloric |
0.01N |
2.0 |
Hydrocyanic |
0.1N |
5.1 |
Hydrogen sulfide |
0.1N |
4.1 |
Lactic |
0.1N |
2.4 |
Malic |
0.1N |
2.2 |
Orthophosphoric |
0.1N |
1.5 |
Oxalic |
0.1N |
1.6 |
Sulfuric |
N |
0.3 |
Sulfuric |
0.1N |
1.2 |
Sulfuric |
0.01N |
2.1 |
Sulfurous |
0.1N |
1.5 |
Tartaric |
0.1N |
2.2 |
BASES |
SOLUTION |
pH |
Ammonia |
N |
11.5 |
Ammonia |
0.1N |
11.1 |
Ammonia |
0.01N |
10.6 |
Borax |
0.1N |
9.2 |
Calcium carbonate |
saturated |
9.4 |
Ferrous hydroxide |
saturated |
9.5 |
Lime |
saturated |
12.4 |
Magnesia |
saturated |
10.5 |
Potassium |
0.01N |
11.0 |
Potassium hydroxide |
N |
14.0 |
Potassium hydroxide |
0.1N |
13.0 |
Potassium hydroxide |
0.01N |
12.0 |
Sodium bicarbonate |
0.1N |
8.4 |
Sodium carbonate |
0.1N |
11.6 |
Sodium hydroxide |
N |
14.0 |
Sodium hydroxide |
0.1N |
13.0 |
Sodium hydroxide |
0.01N |
12.0 |
Sodium metasilicate |
0.1N |
12.6 |
Sodium sesquicarbonate |
0.1N |
10.1 |
Trisodium phosphate |
0.1N |
12.0 |