Question

`AgNO_(3)(aq.)` was added to an aqeous `KCl` solution gradually and the conductivity of the solution was measured. The plot of conductance `(Lambda)` versus the volume of `AgNO_(3)` is :


A.
B.
C.
D.

Answer 1

Correct Answer - D
`K^(+) (aq) + Cl^(-) (aq) + Ag^(+) (aq) + NO_(3)^(-) (aq) to K^(+) (aq) _ NO_(3)^(-) (aq) + AgCl(s)`
Initially the conductance is due to `K^(+)` and `Cl^(-)` ions . On adding `AgNO_(3)` , precipitate of AgCl is formed . Thus some `Cl^(-)` ions are replaced by `NO_(3)^(-)` ions . As both have nearly the same conductance remains almost constant . After the end points , addition of `AgNO_(3)` will give `Ag^(+)` and `NO_(3)^(-)` ions in the solution . Hence , conductance will increase rapidly .