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  4. AgNO3 (aqueous) was added to an aqueous KCl solution gradually and the conductivity of the solution was measured. The plot of conductance Lambda versus the volume of AgNO3 is

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Q. $AgNO_3$ (aqueous) was added to an aqueous $KCl$ solution gradually and the conductivity of the solution was measured.
The plot of conductance $\Lambda$ versus the volume of $AgNO_3$ isChemistry Question Image

IIT JEEIIT JEE 2011Electrochemistry

Solution:

As $AgNO_3$ is added to solution, $KCl $ will be displaced according to following reaction.
$ AgNO_3(aq)+KCl(aq) \longrightarrow AgCl(s)+KNO_3(aq)$
For every mole of $KCl$ displaced from solution, one mole of $KNO_3$ comes in solution resulting in almost constant conductivity. As the end point is reached, added $AgNO_3$ remain in solution increasing ionic concentration, hence conductivity increases.