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What is Acid?
The substances that taste sour are called acid and their nature is acidic.
• The term acid is derived from a Latin word acere which means sour.
• An acid is a molecule or ion capable of donating a proton, or, alternatively, capable of forming a covalent bond with an electron pair.
• Acid turns blue litmus paper to red. Acid is a substance that contains hydrogen ion (H+).
• Acids do not give colour with phenolphthalein indicator and do not absorb carbon dioxide gas. Also, acids do not react with an ammonium salt.
• Natural Acids are the acids that occur in nature, such as, acids present in fruits.
• Acids are generally found in Vinegar, Curd, Spinach, lemons, Citrus fruits, Amla, Tamarind, grapes, unripe mangoes, Citrus fruits such as oranges, etc.
• Acids reacts with Bases to give Salt and Water. Acid + Base --> Salt + Water
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