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Antacid Effectiveness by Back Titration
Course: CHEMISTRY 110L , Fall 2008School: Quinnipiac
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Antacid Effectiveness by Back Titration Jenine Hajjar October 29, 2007 Professor Lloyd Chem 110 Sect. C Purpose The objective of the experiment was to determine the neutralization capacity of two different commercial antacid tablets by using the back titration method. Procedure Refer to page 25 laboratory notebook for the Antacid Effectiveness by Back Titration lab. No changes were made to the original procedure....
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Antacid Effectiveness by Back Titration Jenine Hajjar October 29, 2007 Professor Lloyd Chem 110 Sect. C Purpose The objective of the experiment was to determine the neutralization capacity of two different commercial antacid tablets by using the back titration method. Procedure Refer to page 25 laboratory notebook for the Antacid Effectiveness by Back Titration lab. No changes were made to the original procedure. Calculations Summary of Results Molarity of NaOH: __.1__ Molarity of HCl: __.1__ commercial antacid <a href="/keyword/active-ingredient/" >active ingredient</a> mmoles of H+ reacted/g sample mmoles <a href="/keyword/active-ingredient/" >active ingredient</a> /g sample mg <a href="/keyword/active-ingredient/" >active ingredient</a> /g sample mg <a href="/keyword/active-ingredient/" >active ingredient</a> /tablet Tums CaCO3 2.079 4.09 409 528.02 commercial antacid <a href="/keyword/active-ingredient/" >active ingredient</a> mmoles of H+ reacted/g sample mmoles <a href="/keyword/active-ingredient/" >active ingredient</a> /g sample mg <a href="/keyword/active-ingredient/" >active ingredient</a> /g sample mg <a href="/keyword/active-ingredient/" >active ingredient</a> /tablet Walgreens CaCO3 1.928 3.78 378 489.13 Conclusion The purpose of the experiment was achieved by performing a back titration in order to determine the neutralization capacity of two different commercial antacid tablets. Percent composition of <a href="/keyword/active-ingredient/" >active ingredient</a> in Tums was 41% and in Walgreens brand it was 38%. Possible sources of error would be to add to much NaOH to the HCl solution or not enough thymol blue, therefore disturbing the results of the experiment. No data was discarded.
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