Question

Another way to treat data from a pH titration is to graph the absolute value of the change in pH per change in milliliters added versus milliliters added (△pH/△mL versus mL added). Make this graph using your results from Exercise 67. What advantage might this method have over the traditional method for treating titration data?

Short answer

The advantage of titration graph over traditional plot can be found. On comparing it to the traditional acid base curve of titration, this type is highly accurate to determine the equivalence point.

Step-by-step solution

Data of volume, pH, volume, and pH change 

The table can be drawn as:

Volume	pH	Change in pH	Change in volume	Change in pH/volume
0	2.43
4	3.12	0.69	4	0.1725
8	3.53	0.41	4	0.1025
12.5	3.86	0.33	4.5	0.073333333
20	4.46	0.6	7.5	0.08
24	5.24	0.78	4	0.195
24.5	5.55	0.31	0.5	0.62
24.9	6.26	0.71	0.4	1.775
25	8.13	1.87	0.1	18.7
28	11.75	3.62	3	1.206
30	11.96	0.21	2	0.105

Graph of the titration

The graph of the titration can be drawn as:

On comparing it to the traditional acid base curve of titration, this type is highly accurate to determine the equivalence point.