A buffer solution is prepared by mixing '' moles of and '' moles of such that , into water to make buffer solution. If the instantaneous buffer capacity of this solution is plotted against moles of sa

Question

A buffer solution is prepared by mixing '$a$' moles of $CH_3COONa$ and '$b$' moles of $CH_3COOH$ such that $(a + b) = 1$, into water to make $1	ext{L}$ buffer solution. If the instantaneous buffer capacity of this solution is plotted against moles of salt '$a$', what will the graph approximately look like?

Prashant Kotian · Accepted Answer

Correct answer: B. Buffer capacity is maximum when the concentration of salt equals the concentration of the acid (). Since , maximum capacity occurs when and . The plot of buffer capacity versus '' is a bell-shaped curve peaking at .

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