pH
Measures the acidity of a solution. It is the negative logarithm of the concentration of the hydrogen ions in a substance. If the hydrogen ion concentration of a solution is 1x10-n mol litre-1, then the pH of the solution is n. The lower the pH, the more acid the solution. A pH of 7 corresponds to a neutral solution.
| pH | |
| 0 | |
| hydrochloric acid, sulphuric acid | |
| 1 | stomach acid |
| 2 | battery acid |
| 3 | vinegar |
| lemon juice | |
| 4 | tomato juice |
| 5 | acid rain, black coffee |
| human skin | |
| 6 | |
| saliva, milk | |
| 7 | distilled water |
| blood | |
| 8 | seawater |
| 9 | baking soda |
| soap | |
| 10 | |
| 11 | domestic bleach |
| milk of magnesia | |
| 12 | |
| 13 | |
| caustic soda | |
| 14 |
See also: Acid, Acid-Base Indicator, Alkaline, Base, Litmus, Litmus Paper, Logarithm, pOH, Universal Indicator.
Subjects: Chemistry