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
1stomach acid
 
2battery acid
 
3vinegar
 lemon juice
4tomato juice
 
5acid rain, black coffee
 human skin
6
 saliva, milk
7distilled water
 blood
8seawater
 
9baking soda
 soap
10
 
11domestic bleach
 milk of magnesia
12
 
13
 caustic soda
14

See also: Acid, Acid-Base Indicator, Alkaline, Base, Litmus, Litmus Paper, Logarithm, pOH, Universal Indicator.

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Subjects: Chemistry