JEE PYQ: Electrochemistry Question 1
Question 1 - 2021 (16 Mar Shift 2)
A 5.0 m molal$^{-2}$ aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell constant 1.3 cm$^{-1}$. The molar conductivity of this solution is ____ mSm$^2$ mol$^{-1}$.
(Round off to the Nearest Integer)
Show Answer
Answer: 14.3
Solution
Molarity $= 5 \times 10^{-3}$ mol/L. Conductivity $= G \times (l/A) = 0.55\text{ mS} \times \frac{1.3}{100}$ m$^{-1}$ $= 55 \times 1.3$ mSm$^{-1}$. $\Lambda_m = \frac{1}{1000} \times \frac{55 \times 1.3}{\frac{5}{1000}} = 14.3$ mSm$^2$ mol$^{-1}$.
BETA
