Verified Solution • 2025–26 Session moderate

QAIPMT-2007-Ch-2305: NEET 2007 Chemistry - Class 12 AIPMT-2007-Ch-2305 Solution: A weak acid HA has a \(K_a\) of \(1.00 10^{-5}\). If 0.100 mol…

A weak acid HA has a KaK_a of 1.00×10−51.00 \times 10^{-5}. If 0.100 mol of this acid is dissolved in one litre of water the percentage of acid dissociated at equilibrium is closest to 1.00% 99.9% 0.100% 99.0%

Multiple Choice Options

  • A 0.56 K
  • B 1.12 K
  • C −- _ 0.56 K
  • D −- _ 1.12 K

Step-by-Step Verified Solution

HX | _ | H + | + | X - Initially | 1 | 0 | 0 At equilibrium | 1 - _ | _ | _ Total moles = 1 � _ + _ + _ = 1 + _ _ i = 1 + _ 1 Given, _ = 20% = 0.2 _ i = 1 + _ = 1 + 0.2 = 1.2 _ T f = ik f m = 1.2 _ 1.86 _ 0.5 = 1.12 K

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