1. Tardigrade
  2. Question
  3. Chemistry
  4. The molar ionic conductivities of NH4+ and OH- at infinite dilution are 72 and 198 ohm-1 cm2 respectively. The molar conductivity of a centinormal NH4OH solution at the same temperature is found to be 9 ohm-1 cm2. The percentage dissociation of NH4OH at this concentration will be

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The molar ionic conductivities of $NH_{4}^{+}$ and $OH^{-}$ at infinite dilution are 72 and 198 $ohm^{-1} cm^{2}$ respectively. The molar conductivity of a centinormal $NH_{4}OH$ solution at the same temperature is found to be 9 $ohm^{-1} cm^{2}.$ The percentage dissociation of $NH_{4}OH$ at this concentration will be

Electrochemistry

Solution:

$\wedge_{m}^{∘} \left(NH_{4}OH\right)=\lambda^{∘}_{NH_4^{+}} +\lambda^{∘}_{OH^{-}}$
$=72+198=270 ohm^{-1} cm^{2}$
$\alpha=\frac{\Lambda_{m}^{c}}{\Lambda_{m}^{∘}}=\frac{9}{270}=\frac{1}{30}=3.33\%.$