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Neutralizing Power of Antacids

Due Today: 1. Neutralizing Power of Antacids Pre-Lab 2. Acid-Base Short Lab Report Homework: 1. Neutralizing Power of Antacids Formal Lab Report 2. Iron Content Analysis Pre-Lab. Neutralizing Power of Antacids. Objective. Measure neutralizing capacity of a commercial antacid

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Neutralizing Power of Antacids

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  1. Due Today: 1. Neutralizing Power of Antacids Pre-Lab 2. Acid-Base Short Lab Report Homework: 1. Neutralizing Power of Antacids Formal Lab Report 2. Iron Content Analysis Pre-Lab Neutralizing Power of Antacids

  2. Objective • Measure neutralizing capacity of a commercial antacid • Determine which brand is most cost effective

  3. Procedure Notes • Part I: Standardizing NaOH • Completed in Acid-Base Titration Lab

  4. Procedure Notes • Part II: Titration with simulated Stomach Acid • Use graduated pipettes • Add bromophenol blue indicator • Yellow → Blue • Make sure there is no green tint!

  5. Procedure Notes • Part III: Stomach acid/Antacid Reaction • Record all pertinent information from packaging • Use graduated pipets • GENTLY heat • Heat no higher than 3 • Some solids may remain • Keep track of the # of pipets added

  6. Procedure Notes • Part IV: Neutralizing excess Stomach Acid • Use GRADUATED pipets • Add bromophenol blue indicator • Yellow → Blue • Make sure there is no green tint!

  7. Waste • Titrated solutions → dispose in the sink • Excess NaOH → place in large carboy

  8. Risk assessment • Hydrochloric Acid • Danger • Inhalation Hazard • Corrosive • Sodium Hydroxide • Danger • Inhalation Hazard • Corrosive

  9. calculations • Total Moles of HCl added to antacid: • V= (total number of pipets used) • 1 Pipet = 25.00 mL

  10. calculations • Moles neutralized per dose • Dose of antacid per dollar

  11. Calculations • Moles HCl neutralized per dollar • You must collect ALL groups moles/$ values

  12. Antacid information

  13. Cost effectiveness comparison

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