Question:
The ion with the highest limiting molar conductance at 298 K is
The ion with the highest limiting molar conductance at 298 K is
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\(H^+\) and \(OH^-\) always have highest conductance due to special transport mechanisms.
Updated On: Apr 24, 2026
- \(H^+\)
- \(Na^+\)
- \(K^+\)
- \(Ca^{2+}\)
- \(Mg^{2+}\)
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The Correct Option is A
Solution and Explanation
Concept:
Limiting molar conductance depends on ionic mobility.
Step 1: Understand mobility of ions.
• \(H^+\) shows exceptionally high mobility due to proton hopping (Grotthuss mechanism)
• Other ions move via normal diffusion
Step 2: Compare ions.
\[ H^+>K^+>Na^+>Ca^{2+}>Mg^{2+} \]
Step 3: Select highest value.
\[ H^+ \text{ has maximum limiting molar conductance} \]
Step 1: Understand mobility of ions.
• \(H^+\) shows exceptionally high mobility due to proton hopping (Grotthuss mechanism)
• Other ions move via normal diffusion
Step 2: Compare ions.
\[ H^+>K^+>Na^+>Ca^{2+}>Mg^{2+} \]
Step 3: Select highest value.
\[ H^+ \text{ has maximum limiting molar conductance} \]
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