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$\lambda_{\mathrm{ClCH}_2 \mathrm{COONa}}=224 \mathrm{ohm}^{-1} \mathrm{~cm}^2 \mathrm{gmeq}^{-1}$
$\lambda_{\mathrm{NaCl}}=38.2 \mathrm{ohm}^{-1} \mathrm{~cm}^2 \mathrm{gmeq}^{-1}$
$\lambda_{H C l}=2030 \mathrm{hm}^{-1} \mathrm{~cm}^2 \mathrm{gmeq}^{-1}$
What is the value of $\lambda_{\mathrm{ClCH}_2 \mathrm{COOH}}$
Options:
$\lambda_{\mathrm{NaCl}}=38.2 \mathrm{ohm}^{-1} \mathrm{~cm}^2 \mathrm{gmeq}^{-1}$
$\lambda_{H C l}=2030 \mathrm{hm}^{-1} \mathrm{~cm}^2 \mathrm{gmeq}^{-1}$
What is the value of $\lambda_{\mathrm{ClCH}_2 \mathrm{COOH}}$
Solution:
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Verified Answer
The correct answer is:
$388.5 \mathrm{ohm}^{-1} \mathrm{~cm}^2 \mathrm{gmeq}^{-1}$
$\mathrm{ClCH}_2 \mathrm{COONa}^{\mathrm{HCl}} \rightarrow \mathrm{ClCH}_2 \mathrm{COOH}+\mathrm{NaCl}$
$\lambda_{\mathrm{ClCH}_2 \mathrm{COONa}}+\lambda_{\mathrm{HCl}}=\lambda_{\mathrm{ClCH}_2 \mathrm{COOH}}+\lambda_{\mathrm{NaCl}}$
$224+203=\lambda_{\mathrm{ClCH}_2 \mathrm{COOH}}+38.2$
$\lambda_{\mathrm{ClCH}_2 \mathrm{COOH}}=427-38.2=388.8 \mathrm{ohm}^{-1} \mathrm{~cm}^2 \mathrm{gmeq}^{-1}$
$\lambda_{\mathrm{ClCH}_2 \mathrm{COONa}}+\lambda_{\mathrm{HCl}}=\lambda_{\mathrm{ClCH}_2 \mathrm{COOH}}+\lambda_{\mathrm{NaCl}}$
$224+203=\lambda_{\mathrm{ClCH}_2 \mathrm{COOH}}+38.2$
$\lambda_{\mathrm{ClCH}_2 \mathrm{COOH}}=427-38.2=388.8 \mathrm{ohm}^{-1} \mathrm{~cm}^2 \mathrm{gmeq}^{-1}$
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