Suppose that the electrical conductivity of a solution is directly proportional to the total ions dissolved and using titration procedures the conductivity of three different solutions were measured:
(i) A 0.150 M NaOH is added dropwise in a 1.00 L of 0.150 M HCN solution.
(ii) A 0.150 M CaCl₂ is added dropwise in a 1.00 L of 0.150 M Na₃PO₄ solution.
(iii) A 0.150 M NaBr is added dropwise in a 1.00 L of 0.150 M Pb(NO₃)₂ solution.
Match the following graphs to the correct titration.