The plot obtained from adding AgNO₃(aq.) to a solution of KCl is as follows :

The reaction occurring is :

$$ Ag^ + + NO_3^- + K^ + + Cl^- \to AgCl + K^ + + NO_3^- $$

Or more succinctly :

$$ AgNO_3(aq.) + K^+Cl^-(aq.) \to AgCl(s) + KNO_3 $$

Upon the gradual addition of aqueous AgNO₃, precipitation does not begin immediately. The precipitation of AgCl starts only when the ionic product of AgCl exceeds its solubility product. During this initial phase, AgNO₃ precipitates as AgCl, simultaneously adding NO₃^- ions to the solution. Since the total number of ions remains constant, the conductance does not change, represented by the flat segment AB in the figure. Once precipitation is complete, any further addition of AgNO₃ increases the ion concentration in the solution, thus increasing the conductance, shown by the rising segment BC.