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Formic acid. Acids and Bases - - The substances which taste sour , like Curd, lemon juice, orange juice and vinegar, contain acids and are acidic.
- The substances which are bitter and feel soapy on touching contain bases and are basic.
- Some of the common acids and their sources are mentioned below -
| Name of acid | Source |
| Acetic acid | Vinegar |
| Formic acid | Ant’s sting |
| Citric acid | Citrus fruits such as oranges, lemons, etc. |
| Lactic acid | Curd |
| Oxalic acid | Spinach |
| Ascorbic acid (Vitamin C) | Amla, Citrus fruits |
| Tartaric acid | Tamarind, grapes, unripe mangoes, etc. |
| Sulphuric acid | Burning of the molten sulphur in the presence of air. |
| Nitric acid | Derived from exhaust fumes or the burning of organic compounds that contain nitrogen |
●Some of the
common bases
and their sources are mentioned below -
| Name of base | Source |
| Calcium Hydroxide | Lime water |
| Ammonium Hydroxide | Window cleaner |
| Sodium Hydroxide/Potassium Hydroxide | Soap |
| Magnesium Hydroxide | Milk of magnesia |
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