Which of the following graph of conductometric titration is correct for titration of H2SO4 (aq.) with NH4OH (aq.) ?
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In conductometric titration of H2SO4 with NH4OH, two reactions occur. First, H+ from H2SO4 reacts with OH- to form H2O, decreasing conductivity. After the first equivalence point, the second H+ is titrated, causing another linear decrease. After the second equivalence point, excess NH4OH adds NH4+ and OH- ions, increasing conductivity. The graph shows two descending linear segments followed by an ascending linear segment.
The correct graph is the one with two distinct V-shaped 'knees' and a final upward slope.
Final Answer: The third graph is correct.