An acidic buffer is obtained on mixing

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) An acidic buffer is formed by a mixture of a weak acid and its salt with a strong base.In option $C$,we have $100 \ mL$ of $0.1 \ M \ HCl$ $(10 \

Vedclass · Accepted Answer

$100 \ mL$ of $0.1 \ M \ HCl$ and $200 \ mL$ of $0.1 \ M \ CH_3COONa$

Vedclass · Answer

(C) An acidic buffer is formed by a mixture of a weak acid and its salt with a strong base.In option $C$,we have $100 \ mL$ of $0.1 \ M \ HCl$ $(10 \ mmol)$ and $200 \ mL$ of $0.1 \ M \ CH_3COONa$ $(20 \ mmol)$.The reaction is: $HCl + CH_3COONa \rightarrow CH_3COOH + NaCl$Initial moles: $10 \ mmol \ HCl$ and $20 \ mmol \ CH_3COONa$.After reaction: $0 \ mmol \ HCl$,$10 \ mmol \ CH_3COONa$ remaining,and $10 \ mmol \ CH_3COOH$ formed.Since the final mixture contains a weak acid $(CH_3COOH)$ and its conjugate base ($CH_3COO^-$ from $CH_3COONa$),it acts as an acidic buffer.

Similar Questions

Which of the following mixtures of solutions can function as a buffer solution?

What volume (in $mL$) of $0.10 \, M$ sodium formate is required to be added to $50 \, mL$ of $0.05 \, M$ formic acid to prepare a buffer solution with $pH = 4.0$? (Given: $pK_a$ of formic acid $= 3.7$)

The $pH$ of a buffer solution decreases by $0.02$ units when $0.12 \ g$ of acetic acid is added to $250 \ mL$ of a buffer solution of acetic acid and potassium acetate at $27^{\circ} C$. The buffer capacity of the solution is

What is a buffer solution? Explain the types of buffer solutions with examples and state their biological importance.

Equal volumes of $0.5 \ N$ acetic acid and $0.5 \ N$ sodium acetate are mixed. What is the $pH$ of the resultant solution? $(pK_{a}$ of acetic acid $= 4.75)$

Vedclass Test Series

Exam Paper Generator

Online Exam Module