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Equivalent conductance increases on dilution while specific conductance decreases because dilution

  • A.reduces the ions per unit volume but increases dissociation
  • B.increases the ions per unit volume and the dissociation
  • C.reduces both the ions per unit volume and the dissociation
  • D.has no effect on the degree of dissociation of the solute

Answer: A

Correct answer: reduces the ions per unit volume but increases dissociation

The two quantities move oppositely because they measure different things. Specific conductance is per unit volume, and dilution puts fewer ions in each cubic centimetre, so it falls. Equivalent conductance refers to a fixed quantity of solute, and dilution increases the degree of dissociation and reduces the interionic attraction, so more of that fixed quantity conducts and it rises.

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