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In the Electrolytes and Nonelectrolytes lab you measured the conductance of 0.02 M solutions of KNO3,...

In the Electrolytes and Nonelectrolytes lab you measured the conductance of 0.02 M solutions of KNO3, NaCl, and NaOH. You diluted these solutions to 0.10 M and measured the conductance again. How did the conductivity change after the solution was diluted?

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Answer #1

are strong electrolytes. Their initial concentration was 0.02 M, The final concentration of the solutions are 0.1 M. Thus, the concentration of the electrolytes has increased.

The conductance of a solution is due to the presence of ions in the solution. The greater the number of ions, more is the conductance. As on dilution, more ions are produced, so conductance should also increase on dilution. Here, since the concentration is being increased, it's conductance decreases.

The specific conductivity falls with dilution, because, the number of current carrying particles per ml decreases with dilution or decrease in concentration. Here, since the concentration is being increased, it's conductivity increases.

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