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Chemical Equilibrium question

2023 · Q90
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Chemical Equilibrium question

2023 · Q90

NEETChemistryChemical EquilibriumMCQ+4 / −1

For a weak acid HA, the percentage of dissociation is nearly 1% at equilibrium. If the concentration of acid is 0.1 mol L−1^{-1}−1, then the correct option for its Ka_aa​ at the same temperature is :

  1. A
    1×10−41\times10^{-4}1×10−4
  2. B
    1×10−61\times10^{-6}1×10−6
  3. C
    1×10−51\times10^{-5}1×10−5
  4. D
    1×10−31\times10^{-3}1×10−3
View written solutionFree

Correct answer: C

$$\mathrm{K_a=C\alpha^2}$$

$$\mathrm{K_a=(0.1)\times(0.01)^2}$$

$$\mathrm{K_a=1\times10^{-5}}$$

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