Question

$AgNO_3$ (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 $AgNO_3$ is

• A. (P)
• B. (Q)
• C. (R)
• D. (S)

Answer 1

Answer: (D)

(S)

Answer 2

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 KC1 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.