MCQ
If $\Lambda_{ m }^{\circ}$ of $NaCl , HCl$ and $CH _3 COONa$ are $x, y$ and $z$ $S cm ^2 mol^{-1}$ respectively then $\Lambda_{ m }^{\circ}$ of $CH _3 COOH$ will be.
- Az + y + x
- Bx - z - y
- ✓z + y - x
- Dz - y - x
✓
Answer
Correct option: C.
z + y - x
(C) z + y - x
$\begin{aligned} & \wedge_m^o CH _3 COOH =\wedge_m^o CH _3 COO ^{-}+\wedge_m^o H ^{+} \\ = & \wedge_m^o CH _3 COONa +\wedge_m^o HCl -\wedge_m^o NaCl \\ = & z+y-x\end{aligned}$
$\begin{aligned} & \wedge_m^o CH _3 COOH =\wedge_m^o CH _3 COO ^{-}+\wedge_m^o H ^{+} \\ = & \wedge_m^o CH _3 COONa +\wedge_m^o HCl -\wedge_m^o NaCl \\ = & z+y-x\end{aligned}$
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