Chemistry Mini Project 3

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 1.205 .001205
Tums 22.4 mL 1.00 .00112
Mylanta 20.0 mL 0.995 .001
CVS 19.9 mL 1.220 .0009995
Rennies 24.4 mL 1.120 .00122

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

Question #2

Antacid Moles base in one dose Mass of one dose Moles/gram for one dose
Maalox 24.1 20.0 g .00013975
Tums 22.4 21.0 g .0001371
Mylanta 20.0 18.0 g .0001666
CVS 19.9 18.3 g .0001642
Rennies 24.4 17.5 g .001588

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 here.

#1 –
Maalox: 0.05 mol/L*24.1 mL= 1.205 mmol/1000=.001205 mol
Tums: 0.05 mol/L*22.4 mL= 1.120 mmol/1000-.00112 mol
Mylanta: 0.05 mol/L*20.0 mL=