Sc155 – Mini Project #3

Please remember to show all your work for the calculations in questions 1 and 2. These can be added at the end of this document (see Calculations Section). Complete the yellow shaded regions in the document below.

Question #1

Antacid
Volume NaOH used in back-titration (mL)
Volume NaOH used in back-titration (L)
Moles NaOH used in back-titration
Maalox
24.1 mL

Tums
22.4 mL

Mylanta
20.0 mL

CVS
19.9 mL

Rennies
24.4 mL

Based on the values you calculated above, which antacid is the strongest / weakest on a single-dose basis? Please explain.

Question #2

Antacid
Moles HCl neutralized by the antacid
Mass of one dose
Moles/gram for one dose
Maalox

20.0 g

Tums

21.0 g

Mylanta

18.0 g

CVS

18.3 g

Rennies

17.5 g

Based on the values you calculated above, which antacid is the strongest / weakest on a by-weight (mass) basis? Please explain.

Question #3

What might you have used in the above experiment in order to see a visible color change in the solution? At what pH would the solution have been neutral?

Question #4

If you had walked into the lab, only to discover that you only had 0.1 M sulfuric acid available to run you tests, how might this have affected your calculations? Why?

Question #5

Balance the following reaction.

Al(OH)3 + HCl  AlCl3 + H2O

Question #6

FDA major findings report and summary.

Calculations Section

Please show calculations for questions #1 and #2