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MHT CET202122 Sep 2021Evening ShiftChemistryChemical EquilibriumActual

A weak monobasic acid is 10 % dissociated in 0.05 M solution. What is its percentage dissociation in 0.10 M solution?

Options

  1. A5.27 %
  2. B7.17 %
  3. C10.3 %
  4. D4.5 %

Correct answer

B. 7.17 %

Step-by-step solution

Weak monobasic acid (HA) aligned & C HA _ ( aq ) H _ aq ⁺+ A _ aq ⁻ & C-C C C & Ka = C ^2 1- & 1- 1 & ( array l C ₁=0.05, =10 %=0.1 C ₂=0.1, ₂=? array . & K _ a = C ^2 & C ₁ ₁^2= C ₂ c ₂^2 & 0.05 0.1 0.1=0.1 ₂^2 & ₂^2=5 10⁻³ & = 5 1000 = 1 200 & ₂= 1 200 =0.717 & ₂=7.17 % & aligned

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