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Testing Antacids

Testing Antacids. TB: Pg. 320 – 321 WB: Pg. 114 - 115. Introduction to the Lab on Antacids: Stomach Acid. Hydrochloric acid in your stomach? pH of stomach = 1.5 Stomach is acidic enough to dissolve magnesium. Stomach Acid. What happens if the concentration of the stomach is too high? Pain

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Testing Antacids

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  1. Testing Antacids TB: Pg. 320 – 321 WB: Pg. 114 - 115

  2. Introduction to the Lab on Antacids: Stomach Acid • Hydrochloric acid in your stomach? • pH of stomach = 1.5 • Stomach is acidic enough to dissolve magnesium

  3. Stomach Acid • What happens if the concentration of the stomach is too high? • Pain • Swelling • Inflammation • Bleeding in stomach lining

  4. Stomach Acid • What can we do to control increase in stomach acid? • Use bases • A base neutralizes acid & increases pH

  5. What are antacids? • An antacid is a base which counteracts stomach acidity. • Antacids neutralize stomach acids. • Examples:

  6. Testing Antacids • Purpose: • How do antacid tablets compare in their acid-neutralizing ability to baking soda? • Are all antacid tablets equally effective? • Hypothesis: • I think all antacid tablets are ….stronger/weaker than baking soda • I think all antacid tablets are…equally effective, one is better than the other…because…

  7. Testing Antacids • Materials • MY CLASS site – Antacid Lab - Materials • Procedure • MY CLASS site – Antacid Lab - Procedure

  8. Testing Antacids using Universal Indicator [*=antacid, crushed, dissolving, w/ univ.ind’tr]

  9. Results

  10. Antacid Lab Report – see MY CLASS – Grade 10 Formal Lab Report Guidelines Cover Page = title, format=name & #, course, date, instructor Introduction = problem-stomach acid, antacid, purpose, hypothesis, include embedded references (author, date) Materials = bullet list Procedure = past tense, numbered, indented

  11. Antacid Lab Report – see MY CLASS – Grade 10 Formal Lab Report Guidelines Results & Analysis Discussion = pg.321 answer Qns. (e,f,g,h,i[bar graph]) + sources of experimental error + suggestions for improvements of procedure Conclusion References in APA format – alphabetical list Note footer used for Grade 10 Formal Lab Report Guidelines in MY CLASS site, use this style for your lab report, [name, title, page 2 of 6]

  12. Marking Scheme [10 marks each] KU = Introduction, Materials, Procedure TI = Results & Analysis Comm = Title Page, throughout report, format, footer Appn = Discussion, Conclusion, References

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