MHT CET202410 May 2024Evening ShiftChemistryIonic EquilibriumActual
Calculate dissociation constant of a weak monobasic acid if it is 0.05 % dissociated in 0.02 M solution.
Options
- A2.0 10⁻⁹
- B3.0 10⁻⁹
- C4.0 10⁻⁹
- D5.0 10⁻⁹
Correct answer
D. 5.0 10⁻⁹
Step-by-step solution
aligned & HA H _ (aq) ^ + A _ ( aq ) ^ & aligned & aligned & =0.05 % aligned =0.05 10⁻² & ~K _ a = ^2 C &= (0.05 10⁻² )^2 0.02 M &=5.0 10⁻⁹ aligned aligned