COMEDK · Chemistry · 8. Ionic Equilibrium
The pH at which an acid indicator with \(K_\alpha=1 \times 10^{-5}\) changes colour when the indicator concentration is \(1 \times 10^{-3} \mathrm{M}\) is
- A 4
- B 5
- C 6
- D 3
Answer & Solution
Correct Answer
(B) 5
Step-by-step Solution
Detailed explanation
An acid indicator is a weak acid. It dissociates \(\underset{\text { Colour } A}{\operatorname{HIn}} \rightleftharpoons \mathrm{H}^{+}+\underset{\text { Colour } B}{\operatorname{In}^{-}}\)…
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