Pepsin and Antacid Results

Averages of Collected Data

Tube No.	Contents	No. of Tests	Avg pH	Std. Dev.	Avg Reaction*	Std. Dev.
1	dH₂O	101	6.04	±1.07	0.46	±0.76
2	dH₂O + Pepsin	101	4.88	±1.19	1.30	±0.76
3	NaHCO₃ + dH₂O	101	8.16	±1.20	0.64	±0.89
4	HCl + dH₂O	101	1.87	±1.77	0.53	±0.89
5	NaHCO₃ + Pepsin	101	7.41	±1.51	1.42	±0.79
6	HCl + Pepsin	101	1.63	±1.16	2.75	±0.58
7	HCl + Boiled Pepsin	101	1.79	±1.36	2.06	±1.02
8	HCl + Pepsin (RT)	101	1.69	±1.54	2.51	±0.84
9	Rolaids® + Pepsin	55	5.54	±2.07	1.46	±0.89
10	Tums® + Pepsin	60	4.98	±2.05	1.69	±0.83
11	Mylanta® + Pepsin	4	5.00	±2.45	1.75	±0.83
12	Pepto-Bismol® + Pepsin	9	3.78	±3.33	2.11	±0.74
13	Maalox® + Pepsin	4	5.25	±3.42	1.75	±1.09
14	Tylenol	2	1.00	±7.75	2.50	±3.97
15	generic brand	1	2.00		3.00
16	2 off-brand	1	1.60		3.00
17	Powdered Ginger	3	1.33	±0.00	2.33	±0.00
18	5ml pepsin solution	2	2.25	±0.00	0.00	±0.00
19	5ml Omeprazole solution + 5ml 1 pepsin	1	1.50		3.00
20	Omeprazole	1	1.50		3.00
21	5ml omeprazole solution + 5ml 1 pepsin solution	1	5.00		2.00
22	5ml Meijer Calcium Carbonate + 5 mL 1 pepsin	1	6.00		2.00
23	Hillary Watson	3	1.00	±0.00	1.00	±0.00
24	awesome	2	2.00	±0.00	3.00	±0.00
25	5mL .1 M HCI + 5 mL 1 Pepsin solution 5 C	1	1.00		1.00
26	5 mL N HCl + 5 mL 1 pepsin solution refrigerated	1	1.00		1.00
27	7	1	7.00		3.00
28	5ml boiled Pepsin solution + 100 ml NHCL+1 Rolaid	1	6.00		1.00

* Reaction was based on a scale of 0 to 3 where 0 = no change in the egg white and 3 = total disintegration of the egg white.
Note that the “dosage” of antacid tablets used by students varied from one to four per 100 mL of 0.1 M HCl.

Pepsin Results

times since 3 Sep 2011.