Consider a weak base B of pK_b = 5.699. x mL of 0.02 M HCl and y… | JEE Main 2026 Chemistry PYQ

MCQMediumJEE Main 2026 · 28 January, Shift 1Buffer Solutions

Consider a weak base $B$ of $pK_b = 5.699$ . $x$ mL of $0.02$ M HCl and $y$ mL of $0.02$ M weak base $B$ are mixed to make $100$ mL of a buffer of pH $= 9$ at $25^\circ \text{C}$ . The values of $x$ and $y$ respectively are:

[Given: $\log 2 = 0.3010$ , $\log 3 = 0.4771$ , $\log 5 = 0.699$ ]

A
$x = 42.7$ , $y = 57.3$
B
$x = 11.1$ , $y = 88.9$
C
$x = 85.7$ , $y = 14.3$
D
$x = 14.3$ , $y = 85.7$

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