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Question
Assertion :Conductivity of weak electrolytic solution decreases with dilution whereas equivalent conductivity, molar conductivity increases with dilution. Reason: On dilution, the ionic mobility and number of ions present in solution increases but the number of ions per mL decreases.
Assertion :Conductivity of weak electrolytic solution decreases with dilution whereas equivalent conductivity, molar conductivity increases with dilution. Reason: On dilution, the ionic mobility and number of ions present in solution increases but the number of ions per mL decreases.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
On dilution, the ionic mobility and number of ions present in solution increases but number of ions per mL decreases.
Hence, the conductivity of weak electrolytic solution decreases with dilution whereas equivalent conductivity, molar conductivity increases with dilution.
This is because, the conductivity depends on the total number of ions present in a given volume whereas equivalent conductivity and molar conductivity depends on total number of ions only.
On dilution, the ionic mobility and number of ions present in solution increases but number of ions per mL decreases.
Hence, the conductivity of weak electrolytic solution decreases with dilution whereas equivalent conductivity, molar conductivity increases with dilution.
This is because, the conductivity depends on the total number of ions present in a given volume whereas equivalent conductivity and molar conductivity depends on total number of ions only.
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