pH of common Acids, Bases and Salts
The acidity of an aqueous solution relies on the concentration of hydronium ions, [H₃O⁺]. For various products (acids, bases and salts), the magnitude of this concentration varies and pH scale is used conveniently. The pH of a solution is defined as the negative base-10 logarithm of the hydronium ion concentration (in mol/L). Here follows a partial list of pH of common acids, bases and salts.
Solution | PH range |
---|---|
HCL | 1.0 - 2.0 |
Gastric Juices | 1.4 - 2.0 |
Lemon Juice | 2.0- 3.0 |
Vinegar | 4.0 |
Tomato Juice (Oxalic Acid) | 4.1 |
Coffee | 5.0 |
Milk (Lactic Acid) | 6.5 |