Subjective Type

The following curve is obtained when molar conductivity $$ ( \Lambda_m) $$ is plotted against the square root of concentration $$ c^{1/2} $$ for two electrolytes A and B . How do you account for the increase in the molar conductivity of the electrolyte A on dilution ?

Solution

As seen from the graph , electrolyte 'A' is a strong electrolyte which is ionised almost completely almost completely in solutions. For strong electrolyte 'A' the number of ions does not increase appreciably on dilution and only mobility of ions increases due to decrease in interionic attraction . Therefore , molar conductivity increases a little as shown in graph by a straight line.

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