The molar ionic conductivities of nh4+ and oh- at infinite dilution are 72 and 198 ohm-1cm2mol-1 respectively.The molar conductance of a centinormal nh4
Answers
Answer:
ஹர்ஷித் ஹர்ஷித் ஹர்ஷித் ஹர்ஷித் ஹர்ஷித் ஹர்ஷித்
Explanation:
தேங்க் யு!
Thus the value of K is 0.356 mol L^-1
Explanation:
Corrects tatement:
The molar conductivities of NH4 + ion and Cl − ion are 73.5 mho cm^2 mol − 1 and 76.2 mho cm^2 mol −1 respectively. The specific conductivity of 0.1 M NH4 Cl is 1.22×10^−2 mho cm −1. What is the dissociation constant of NH 4 Cl?
Solution:
According to Kohlarsch law:
∧∘ m (NH4 Cl) = λ ∘
NH4 + + λ∘ Cl−
= 73.5 cm^2 mol −1 +76.255 cm^2 mol −1
= 149.755 cm^2 mol −1
∧m = k (Specific conductivity) / c (Concentration)
∧m = 1.22×10^−2 S cm^ −1 / 0.1 M x 1000 cm^3 / 1 L
∧m = 122 Scm2 mol^-1
α = ∧ m / ∧∘m
α = 122 / 149.775
α = 0.814
K = cα^2 / 1 - α
K = 0.1 mol L - 1 0.814 x 0.814 / 1 - 0.814
K = 0.356 mol L^-1
Thus the value of K is 0.356 mol L^-1