Equal volumes of 0.015 M $C H_{3} C O O H$ and 0.015 M $N a O H$ are mixed together. What would be molar conductivity ( $i n S c m^{2} m o l^{- 1}$ ) of mixture if conductivity of $C H_{3} C O O N a$ in final solution is $6.3 \times 10^{- 4} s c m^{- 1} .$ The molar conductivity is $x \times 10^{1}$ . What is the x value (Rounded into nearest integer)?

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answer is 8.

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Detailed Solution

$C H_{3} C O O H$ + NaOH $\to$ $C H_{3} C O O N a$ + $H_{2} O$
$[C H_{3} - C O O N a] =$ $\frac{0.015}{2}$
$A = K \times \frac{1000}{C}$
= $6.3 \times 10^{- 4} \times \frac{1000}{(\frac{0.015}{2})}$
= $84 S c m^{2} m o l^{- 1}$

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