In a potentiometric titration, the endpoint is characterized by where E is the emf of the titration cell and V is the volume of the titrant added
1
\( \frac{d E}{d V}=0, \frac{d^2 E}{d V^2}=0 \)
2
\( \frac{d E}{d V} \neq 0, \frac{d^2 E}{d V^2}=0 \)
3
\(\frac{d E}{d V}=0, \frac{d^2 E}{d V^2} \neq 0 \)
4
\(\frac{d E}{d V} \neq 0, \frac{d^2 E}{d V^2} \neq 0\)
5
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