Question

Need to create pH vs. volume graph and fill out table from experimental data below. I have posted the pH vs. volume graph I have created, not sure if it is right, need to help finding stoichiometric point. I am also required to fill out the table posted below. MY LAB GROUP BAILED ON ME PLZ HELP!!!!!!!!!!!!!!!!!!!!!!!!!

Volume (mL)	pH
0	4.24
1	4.28
2	4.33
3	4.37
4	4.4
5	4.45
6	4.49
7	4.52
8	4.55
9	4.58
10	4.62
11	4.65
12	4.68
13	4.71
14	4.74
15	4.77
16	4.8
17	4.83
18	4.85
19	4.88
20	4.91
21	4.93
22	4.96
23	4.98
24	5
25	5.03
26	5.05
27	5.07
28	5.09
29	5.12
30	5.14
31	5.16
32	5.18
33	5.2
34	5.22
35	5.25
36	5.27
37	5.3
38	5.32
39	5.34
40	5.36
41	5.38
42	5.41
43	5.43
44	5.46
45	5.47
46	5.5
47	5.52
48	5.55
49	5.58
50	5.61
51	5.64
52	5.67
53	5.7
54	5.73
55	5.76
56	5.8
57	5.83
58	5.87
59	5.9
60	5.94
61	5.99
62	6.03
63	6.08
64	6.14
65	6.2
66	6.28
67	6.35
68	6.47
69	6.59
70	6.74
71	7

My calculations so far... really need help...

5) 71.0 - 0.0 = 71.0

6) ---- graph already made if correct -----

7) 0.1 M (71 mL) = 0.1M (0.071 L) = 0.0071 mol = 7.1*10^3 moles

8 - 13) ??????????????

Titration Curve 4 20 40 60 Volume (mL) of 0.1 M NaOH titrant added 1.5 g 1. Mass of dry, solid acid 2. Molar concentration of NaOH, initial 3. Buret reading of NaOH at stoichiometric 0.1 molVL point, final 4. Buret reading of NaOH 5. Volume of NaOH 6. pH vs. NaOH graph 7. Moles of NaOH to stoichiometric point 8. Moles of acid 9. Molar mass of acid 10. Average molar mass of acid 11. Volume of NaOH halfway to 0.0 mL 71.0 mL 71.0 mL stoichiometric point 12. pK of weak acid (from graph) 13. Average pK,,

Answer 1

210 5126 2