Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryMARCH 20242 Marks
Question
Explain buffer action of sodium acetate$-$acetic acid buffer.
✓
Answer
$1.$ The sodium acetate$-$acetic acid buffer acts by utilizing the equilibrium between the weak acid $($acetic acid$)$ and its conjugate base $($acetate ion from sodium acetate$).$
$2.$ When an acid is added to the buffer, the acetate ions neutralize the extra $H^+$ ions, forming more acetic acid and thus preventing a decrease in $pH.$
$3.$ Conversely, when a base is added, the acetic acid donates $H^+$ ions to neutralize the base, forming water and acetate ions, preventing an increase in $pH.$ This mechanism allows the buffer to maintain a relatively constant $pH$ level.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.