Question

define buffer's?give two example's​

Answer 1

Answer:

A buffer is a solution containing either a weak acid and its salt or a weak base and its salt, which is resistant to changes in pH. In other words, a buffer is an aqueous solution of either a weak acid and its conjugate base or a weak base and its conjugate acid. A buffer may also be called a pH buffer, hydrogen ion buffer, or buffer solution.

Examples:

A solution of acetic acid and sodium acetate (CH3COOH + CH3COONa) is an example of a buffer that consists of a weak acid and its salt. An example of a buffer that consists of a weak base and its salt is a solution of ammonia and ammonium chloride (NH3(aq) + NH4Cl(aq).

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Answer 2

Answer:

Buffer are divided into two types÷1) acidic 2)alkaline buffer solution. acidic buffer solution that have a pH below and contain oh weak acid one of its salte.

Explanation:

for example a mixture of acetic acid and sodium acetic acts as a buffer solution with a pH of about 4.75