Question

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

Answer 1

Answer:

ஹர்ஷித் ஹர்ஷித் ஹர்ஷித் ஹர்ஷித் ஹர்ஷித் ஹர்ஷித்

Explanation:

தேங்க் யு!

Answer 2

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

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