Limiting Conductivity: Strong vs Weak Electrolytes

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SUMMARY

The limiting conductivity of weak electrolytes is higher than that of strong electrolytes, as evidenced by the comparison of potassium chloride (KCl) with acetic acid (HAc). KCl has a limiting conductivity of 149 Scm²/mol, while HAc exhibits a significantly higher value of 391 Scm²/mol. This phenomenon is not universally applicable, as demonstrated by contrasting hydrochloric acid (HCl) with HAc, indicating that the relationship between electrolyte strength and conductivity is complex and substance-dependent.

PREREQUISITES
  • Understanding of electrolyte classification: strong vs weak electrolytes
  • Familiarity with conductivity measurements in solutions
  • Knowledge of limiting molar conductivity concepts
  • Basic chemistry principles regarding ion dissociation
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  • Research the principles of limiting molar conductivity in electrolytes
  • Explore the differences in ion dissociation between strong and weak electrolytes
  • Investigate the factors affecting conductivity in various solutions
  • Examine case studies comparing the conductivity of different weak electrolytes
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Chemistry students, researchers in physical chemistry, and professionals in chemical engineering focusing on electrolyte behavior and conductivity analysis.

mattibo
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Why is the limiting conductivity of a weak electrolyte higher than the one for a strong electrolyte?
ex: KCl = 149 Scm2/mol HAc = 391 Scm2/mol
 
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It is not a general rule - compare HCl with HAc.

This comparison is also a hint why there is so large difference between limiting conductivities of substances you have listed.

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methods
 

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