Important Organic Acids
| Name | Chiefly found in | Formula |
| Lactic acid | Sour milk | C2H4OHCOOH |
| Acetic acid | Vinegar | CH3COOH |
| Formic acid (Methanoic acid) | Ant venom | HCO2H |
| Citric acid | Citrus fruits like lemon, lime, orange | C6H8O7 |
| Oxalic acid | Rhubarb, spinach | H2C2O4 |
| Butyric acid | Milk, butter | CH3CH2CH2-COOH |
| Lauric acid | Coconut oil | CH3(CH2)10COOH |
| Malic acid | Sour apples, sour grapes | HO2CCH2CHOHCO2H |
| Tartaric acid | Grapes, tamarinds, pineapples | C4H6O6 |
| Erucic acid | Rapeseed oil, Mustard oil | CH3(CH2)7CH=CH(CH2)11COOH |
Properties of Acids
| 1. Acids have pH less than 7. | |
| 2. Acids turn blue litmus to red. | |
| 3. Acids have sour taste. | |
| Reactions | |
| With bases | Acids react with bases to produce a salt and water. |
| With carbonates | Acids react with carbonates to produce salt, water and carbon dioxide. |
| With metals | Acids react with metals to produce a salt and hydrogen. |