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I need help with this question. EXCEL is needed to graph. Just one question.
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2. A mass of 0.1212 g of an unknown acid is dissolved in a total volume of 25.00 mL. The
25 mL sample is titrated with 0.050 M NaOH. The titration data is shown in the Table .
a.
b.
c.
d.
Use Excel to draw the titration
curve.
From the graph, estimate the
equivalence point and the halfequivalence point.
Use the data to calculate the Molar
Mass of the acid
Use the Ka table to identify the acid
Vexp
(mL)
pHexp
Vexp
(mL)
pHexp
0
2.78
56.26
8.08
1.21
2.9
56.31
8.85
2.71
3.13
56.36
9.41
6.16
3.52
56.16
7.52
7.21
3.6
56.26
8.08
8.66
3.71
56.31
8.85
11.21
3.87
56.36
9.41
13.81
4
56.16
7.52
16.71
4.14
56.26
8.08
17.71
4.19
56.31
8.85
18.71
4.23
56.36
9.41
22.71
4.41
55.11
6.56
23.71
4.45
55.41
6.7
24.81
4.49
55.51
6.77
26.76
4.57
55.81
6.97
27.71
4.61
56.01
7.2
28.66
4.65
56.06
7.3
29.81
4.7
56.16
7.52
31.71
4.78
56.26
8.08
32.71
4.81
56.31
8.85
33.81
4.86
56.36
9.41
36.71
4.98
56.41
9.72
37.76
5.03
56.71
10.39
38.71
5.07
56.81
10.5
39.76
5.11
56.86
10.56
42.71
5.25
56.91
10.6
44.71
5.35
57.1
10.69
45.87
5.41
57.12
10.72
47.71
5.53
57.3
10.82
49.11
5.63
57.32
10.84
49.61
5.67
57.66
10.97
51.41
5.84
57.71
11
52.11
5.92
57.91
11.07
52.61
5.99
58.5
11.21
55.11
6.56
59.81
11.42
55.41
6.7
69.11
11.92
55.51
6.77
72.11
11.99
55.81
6.97
73.11
12.02
56.01
7.2
82.61
12.14
56.06
7.3
89.31
12.18
56.16
7.52
90.71
12.19
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