Below is the data for three titrations. In this experiment wehave 25 mL (approx. 0.03M) of various monoprotic acids and weslowly add 50 mL of NaOH while monitoring pH. We add NaOH to changepH about 0.15 after each addition. We add unti lthe total 50 mL ofbase solution (NaOH) is added. Knowing this, for each trial, whatis the equivalence point(s) and the pKa
Run 1 | |
mL | pH |
0 | 1.89 |
3 | 1.89 |
6 | 2.3 |
7 | 2.29 |
9 | 2.48 |
12 | 2.83 |
14 | 3.59 |
15.5 | 10.23 |
16.5 | 11.69 |
18 | 11.97 |
20 | 12.12 |
22 | 12.27 |
27 | 12.4 |
31 | 12.46 |
34 | 12.54 |
38 | 12.58 |
43 | 12.66 |
50 | 12.68 |
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Run 2 | |
mL | pH |
0 | 3.86 |
1 | 3.8 |
3 | 4.1 |
4 | 4.29 |
4.3 | 4.48 |
6 | 4.61 |
7.8 | 4.76 |
9.4 | 4.88 |
11.3 | 5.01 |
12.8 | 5.13 |
14.8 | 5.27 |
16.8 | 5.44 |
18.4 | 5.64 |
19.8 | 5.8 |
21.6 | 6.02 |
21.8 | 6.18 |
22.1 | 6.33 |
22.9 | 6.78 |
23.4 | 7.62 |
24.1 | 10.25 |
24.5 | 11.24 |
25.8 | 11.64 |
29.5 | 12.02 |
33 | 12.18 |
36.1 | 12.3 |
46 | 12.46 |
50 | 12.52 |
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Run 3 | |
mL | pH |
0 | 4.06 |
5 | 4.6 |
8 | 4.77 |
10 | 4.91 |
13 | 5.12 |
15.4 | 5.26 |
16.5 | 5.42 |
17.7 | 5.52 |
18.8 | 5.62 |
20 | 5.8 |
21 | 5.96 |
22 | 6.35 |
23 | 6.74 |
23.8 | 7.8 |