Electrochemistry Result Question 2
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Answer:
Correct Answer: 2. ( c )
Solution:
- $\mathrm{NaCl}$ and $\mathrm{KCl}$ are strong electrolytes. So, the study of their molar conductances $(\mathrm{m})$ can be experimentally verified by Debye-Huckel Onsagar equation,
Size of $\mathrm{Na}$ is being smaller than $\mathrm{K}$ and $\mathrm{Na}$ will remain in more hydrated state, i.e. larger sized in aqueous solution. As a result, ionic mobility as well as ionic conductance of $\mathrm{Na}$ (or $\mathrm{NaCl}$ as $\mathrm{Cl}^{\ominus}$ is common to $\mathrm{NaCl}$ and $\mathrm{KCl}$ ) will be lower than $\mathrm{K}$ (or $\mathrm{KCl}$ ). Thus, the plot of ${ } _{\mathrm{m}} v s \sqrt{C}$ for $\mathrm{NaCl}$ and $\mathrm{KCl}$ is as
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