2 A student determined the concentration of a weak acid, acetic acid, by a titrimetric method using a standard NaOH solution and a pH meter for end point detection. Table 1.0 below shows the data that was obtained by the student. Table 1.0: Potentiometric titration of acetic acid with 0.100 M standard NaOH solution Burette Reading Volume of NaOH added (mL) pH reading 11.54 0 3.14 12.25 0.71 3.70 13.40 1.86 4.16 16.59 5.05 4.77 17.50 5.96 4.93 19.35 7.81 5.24 20.41 8.87 5.49 21.00 9.46 5.68 21.60 10.06 5.96 21.83 10.29 6.14 22.01 10.47 6.34 22.12 10.58 6.48 22.20 10.66 6.68 22.30 10.76 6.97 22.38 10.84 7.73 22.41 10.87 9.21 22.49 10.95 10.04 22.55 11.01 10.57 22.61 11.07 10.83 23.00 11.46 11.35 23.31 11.77 11.62 23.71 12.17 11.76 24.30 12.76 11.89 25.20 13.66 12.03 Plot the 2nd derivative curve and also determine the end point а b. C.

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Chapter1: Chemical Foundations
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A student determined the concentration of a weak acid, acetic acid, by a titrimetric
method using a standard NaOH solution and a pH meter for end point detection. Table
1.0 below shows the data that was obtained by the student.
Table 1.0: Potentiometric titration of acetic acid with 0.100 M standard NaOH solution
Burette Reading
Volume of NaOH added (mL) pH reading
11.54
0
3.14
12.25
0.71
3.70
13.40
1.86
4.16
16.59
5.05
4.77
17.50
5.96
4.93
19.35
7.81
5.24
20.41
8.87
5.49
21.00
9.46
5.68
21.60
10.06
5.96
21.83
10.29
6.14
22.01
10.47
6.34
22.12
10.58
6.48
22.20
10.66
6.68
22.30
10.76
6.97
22.38
10.84
7.73
22.41
10.87
9.21
22.49
10.95
10.04
22.55
11.01
10.57
22.61
11.07
10.83
23.00
11.46
11.35
23.31
11.77
11.62
23.71
12.17
11.76
24.30
12.76
11.89
25.20
13.66
12.03
Plot the 2nd derivative curve and also determine the end point
ə
b.
C.
Transcribed Image Text:2 A student determined the concentration of a weak acid, acetic acid, by a titrimetric method using a standard NaOH solution and a pH meter for end point detection. Table 1.0 below shows the data that was obtained by the student. Table 1.0: Potentiometric titration of acetic acid with 0.100 M standard NaOH solution Burette Reading Volume of NaOH added (mL) pH reading 11.54 0 3.14 12.25 0.71 3.70 13.40 1.86 4.16 16.59 5.05 4.77 17.50 5.96 4.93 19.35 7.81 5.24 20.41 8.87 5.49 21.00 9.46 5.68 21.60 10.06 5.96 21.83 10.29 6.14 22.01 10.47 6.34 22.12 10.58 6.48 22.20 10.66 6.68 22.30 10.76 6.97 22.38 10.84 7.73 22.41 10.87 9.21 22.49 10.95 10.04 22.55 11.01 10.57 22.61 11.07 10.83 23.00 11.46 11.35 23.31 11.77 11.62 23.71 12.17 11.76 24.30 12.76 11.89 25.20 13.66 12.03 Plot the 2nd derivative curve and also determine the end point ə b. C.
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