The end point for a titration can be determined graphically.The end point volume for a first derivative plot corresponds to:
A)the volume base added where the first derivative curve crosses the x-axis.
B)the volume base added where the first derivative curve has maximum slope.
C)the volume base added where the first derivative curve crosses the y-axis.
D)the volume base added where the first derivative curve has minimum slope.
E)the volume base added where the first derivative curve has a maximum negative slope.

Question

Quizplus · Accepted Answer

The first derivative plot shows the rate of change of the pH with respect to added base. At the end point, the pH suddenly changes, resulting in a peak or trough in the first derivative plot. The volume of base added where the first derivative curve has maximum slope corresponds to the end point volume.

The End Point for a Titration Can Be Determined Graphically