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Equivalent, Molar Conductivity and Cell Constant

A conductivit...

Question

A conductivity cell filled with 0.02M $A g N O_{3}$ gives at $25^{\circ} C$ a resistance of 947 ohms. If the cell constant is $2.3 c m^{- 1}$ . What is the molar conductivity of 0.02 M $A g N O_{3}$ at $25^{\circ} C$ ?

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Solution

$Λ m$ $= \frac{K \times 1000}{M}$
$= C . x \times \frac{1000}{M}$ ; $x = c e l l c o n s t a n t$
$c = c o n d u c t a n c e$
c= $\frac{1}{R}$
$= (\frac{1}{R} \times 2.3 \times \frac{1000}{0.02})$ ; $R = 947 Ω$
$Λ m = 121.43 Ω c m^{2} m o l^{- 1}$

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