Question

Assertion: A solution of sodium acetate and ammonium acetate can act as a buffer.
Reason: A buffer solution consists of a mixture of a weak acid and its conjugate base or vice versa.
A.Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B.Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C.Assertion is true but Reason is false
D.Assertion is false but Reason is true
E.Both Assertion and Reason are false

Answer 1

Hint:A buffer solution or hydrogen ion buffer or \[pH\] buffer is a solution consisting of a mixture of its conjugate base and weak acid, or conjugate acid or weak base. They have their application in drug delivery, fermentation, electroplating food preservatives, printing, and the activity of enzymes.

Complete step by step answer:
-The buffer solution is defined as a solution which is able to maintain its concentration for Hydrogen ion (\[pH\]) with minute changes on the addition or dilution of a small amount of either base or acid.
-Now we will discuss about the types of Buffer Solution
-Buffer solutions are broadly classified into alkaline and acidic buffers.
-First we will study about Acidic Buffers
-Acidic buffers are the solutions that are used for maintaining acidic environments. Solution of the -Acid buffer has acidic \[pH\] ranging from 0-6 and is prepared by mixing weak acid with a strong base along with its salt.
-Now let us take an example to demonstrate the acidic buffer. Solution or buffer has a \[pH\] of \[4.74\] when equal amounts of sodium acetate and acetic acid are combined.
-This buffer solution consists of a weak acid and its salt.
-Similarly for Alkaline Buffers
-These basic buffer solutions have a basic pH ranging from \[7 - 14\], used for maintaining basic conditions. They are prepared by mixing a weak base with strong acid along with its salt.
-Now let us take an example to demonstrate the basic buffer. Solution or buffer has a \[pH\] of \[9.25\] when equal amounts of ammonium chloride and ammonium hydroxide is combined.
-This buffer solution consists of a weak base and its salt.
Thus, the correct option is D, i.e. assertion given is false and the reason is true.

Note:
In order to prepare the buffer \[(p{K_a})\] which is the dissociation constant of the acid and \[(p{K_b})\] which is the dissociation constant of the base should be known, by controlling the ratio of salt base or the salt acid.