Question

What is acid ?

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Answer 1

An acid is a chemical substance that has a sour taste. Many food items such as lemons, curd, vinegar and orange taste sour because of the presence of acid in them. Acidic Substances are the substances that contain acid in them.

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Answer 2

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$\huge\tt\pink{==>}$An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions (acid catalysis).

$\huge\tt\pink{==>}$An acid is a chemical substance that has a sour taste. Many food items such as lemons, curd, vinegar and orange taste sour because of the presence of acid in them. Acidic Substances are the substances that contain acid in them.

$\huge\tt\pink{==>}$An acid is a chemical substance that has a sour taste.

$\huge\tt\pink{==>}$Manu food items such as lemons, curd, vinegar and orange taste sour because of the presence of acid in them.

$\huge\tt\pink{==>}$Acidic Substances are the substances that contain acid in them.

$\huge\tt\pink{==>}$Natural Acids are the acids that occur in nature, for example, acids found in fruits are natural acids.

$\huge\mathbb\blue{\fcolorbox{blue}{pink}{Explanation:-}}$

$\huge\tt\pink{==>}$ acid is a molecule or ion capable of either donating a proton (i.e., hydrogen ion, H+), known as a Brønsted–Lowry acid, or, capable of forming a covalent bond with an electron pair, known as a Lewis acid.[1]

$\huge\tt\pink{==>}$Zinc, a typical metal, reacting with hydrochloric acid, a typical acid

The first category of acids are the proton donors, or Brønsted–Lowry acids. In the special case of aqueous solutions, proton donors form the hydronium ion H3O+ and are known as Arrhenius acids. Brønsted and Lowry generalized the Arrhenius theory to include non-aqueous solvents. A Brønsted or Arrhenius acid usually contains a hydrogen atom bonded to a chemical structure that is still energetically favorable after loss of H+.

$\huge\tt\pink{==>}$Aqueous Arrhenius acids have characteristic properties which provide a practical description of an acid.[2] Acids form aqueous solutions with a sour taste, can turn blue litmus red, and react with bases and certain metals (like calcium) to form salts. The word acid is derived from the Latin acidus/acēre, meaning 'sour'.[3] An aqueous solution of an acid has a pH less than 7 and is colloquially also referred to as "acid" (as in "dissolved in acid"), while the strict definition refers only to the solute.

$\huge\tt\pink{==>}$[1] A lower pH means a higher acidity, and thus a higher concentration of positive hydrogen ions in the solution. Chemicals or substances having the property of an acid are said to be acidic.

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