Respuesta :
Answer:
Option (B) is correct
Explanation:
Buffers are of three kinds - (1) mixture of weak acid and it's salt, (2) mixture of weak base and it's salt and (3) mixture of weak acid and weak base
if we add sodium acetate into a solution of acetic acid then the mixture would act as a buffer due to presence of weak acid (acetic acid) and it's salt (sodium acetate).
If we add some amount of sodium hydroxide into a solution of acetic acid then some amount of acetic acid gets converted to it's sodium salt. Hence, unreacted amount of acetic acid and it's salt acts as a buffer.
So, either sodium acetate or sodium hydroxide addition would produce a buffer.
Buffer is an aqueous solution that can withstand the change in the pH after adding an acidic or basic solution. To prepare buffer sodium acetate or sodium hydroxide can be added.
What is buffer?
Buffer is the solution in the aqueous medium that can resist pH change when an acidic or alkaline solution is added to them. It can be an acidic or alkaline buffer, based on the amount of acids and bases in them.
The addition of sodium acetate in the acetic acid solution will result in the formation of the salt of sodium acetate and a weak acid of acetic acid.
The addition of sodium hydroxide in the acetic acid solution will result in the formation of unreacted acetic acid and salt of sodium in the buffer.
Therefore, option B) sodium acetate or sodium hydroxide can be added to prepare the buffer.
Learn more about buffer here:
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