Antacid Analysis Lab

Antacid Analysis Lab - Emily Bissel Lab Partner: Becca...

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Emily Bissel MS# 1116 March 31, 2008 Tuesday PM Lab 8: Antacid Analysis Introduction: A normal human stomach has a pH between 1.0 to 2.0. When acid indigestion or heartburn  occur, the acidity of the stomach is generally at a lower pH. In order to relieve the pain caused  by acid indigestion, people take antacids which help to neutralize the extra H+ ions in the  stomach. One example of this is Milk of Magnesia which acts with the H+ to yield water and  magnesium. Another solution to heartburn is antacids which contain Calcium Carbonate to  buffer the excess acid. These include more common brands such as Tums and Alka Seltzer. By  using acid-base titrations, the effectiveness of the various brands of antacids can be tested.  Adding excess Hydrochloric acid to the dissolved antacid drives the equilibrium to the right  (products), and causes for all of the antacid to be neutralized. By heating the solution, excess  CO 2  can be driven off and the HCl excess can be titrated with the NaOH to determine the  number of mols of antacid by the equation: moles antacid  = moles  HCl  – moles NaOH . By comparing the  mols of OH- per gram of antacid we can compare the various antacid brands to determine which 
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This lab report was uploaded on 04/16/2008 for the course CHEM 006L taught by Professor Miller during the Spring '08 term at Westmont.

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Antacid Analysis Lab - Emily Bissel Lab Partner: Becca...

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