JEE Advanced · Chemistry · 17. Electrochemistry
\(\mathrm{AgNO}_3(a q)\) was added to an aqueous \(\mathrm{KCl}\) solution gradually and the conductivity of the solution was measured. The plot of conductance \((\Lambda)\) versus the volume of \(\mathrm{AgNO}_3\) is
- A P
- B Q
- C R
- D S
Answer & Solution
Correct Answer
(D) S
Step-by-step Solution
Detailed explanation
As \(\mathrm{AgNO}_3\) is added to solution, \(\mathrm{KCl}\) will be displaced accrding to following reaction
\(\mathrm{AgNO}_3(a q)+\mathrm{KCl}(a q) \longrightarrow \operatorname{AgCl}(s)+\) \(\mathrm{KNO}_3(a q)\)
For every mole of \(\mathrm{KCl}\) displaced from solution, one mole of \(\mathrm{KNO}_3\) comes in solution resulting in almost constant conductivity. As the end point is reached, added \(\mathrm{AgNO}_3\) remain in solution increasing ionic concentration, hence conductivity increases.
\(\mathrm{AgNO}_3(a q)+\mathrm{KCl}(a q) \longrightarrow \operatorname{AgCl}(s)+\) \(\mathrm{KNO}_3(a q)\)
For every mole of \(\mathrm{KCl}\) displaced from solution, one mole of \(\mathrm{KNO}_3\) comes in solution resulting in almost constant conductivity. As the end point is reached, added \(\mathrm{AgNO}_3\) remain in solution increasing ionic concentration, hence conductivity increases.
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