[ixi]

In P.chem lab we did a conductance experiment and I have a question about the calculation.


Using equation kappa = K/R  where kappa is the conductivity, I can find out what K is. Because we used 0.02 M KCl, kappa is 0.27653 (given). And I found K to be 0.72. Then it says that once K is figured out, I can use the pervious equation to find kappa for any solution.

My question is, we did this experiment with 4 different solutions. For each solution we diluted it 6 times so that the concentration is different. Because K was found at 0.02 M, could I still use that value for the other concentrations as well?

Also, one of our stock solutions was 0.05 M, would I still use 0.72 for K?


Help please and thanks

[nextpauling]

We just did the same experiment...k is a constant for you conductivity cell and so should be independent of the solute concentration.  I believe it represents the ratio of the distance between the electrodes to the surface area of the electrodes in your cell.