CHE 101 - Lab 12.docx - Evaluating the Efficacy of Antacids Lab#12 \u2013 Evaluating the Efficacy of Antacids Gabriela Couch Partner N\/A December 1 2019

CHE 101 - Lab 12.docx - Evaluating the Efficacy of Antacids...

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Evaluating the Efficacy of Antacids Lab #12 – Evaluating the Efficacy of Antacids Gabriela Couch Partner: N/A December 1, 2019 1 ©2014, Carolina Biological Supply Company
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Evaluating the Efficacy of Antacids Purpose: The purpose of this lab is to determine the neutralization capacity for the various types of antacids as well as identifying the efficacy of antacids and determining their beneficial dosages. Hypothesis: If the antacids are effective, then the pH of the solution should increase, Pre-Laboratory Questions 1.A common side effect of some antacids is feeling ‘gassy.’ Explain why. 2.Write the balanced net ionic equation for each of the three antacid reactions. 2 ©2014, Carolina Biological Supply Company
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Evaluating the Efficacy of Antacids Data Tables Data Table 1: Analysis of Alka-Seltzer Trial 1 Trial 2 Mass of acetic acid 5.00 g 5.00 g Density of acetic acid 1.00 g/mL Concentration of acetic acid 0.88 M Mass of Alka-Seltzer 3.26 g 3.14 g Volume of NaOH, initial 5.2 mL 5.00 mL Volume of NaOH, final 4.5 mL 4.4 mL Volume of NaOH, total 0.7 mL 0.6 mL Moles of acetic acid 0.052 0.052 Moles of NaOH 0.015 0.015 Moles of NaHCO 3 0.038 0.038 Moles NaHCO 3 / g Alka- Seltzer 0.012 0.012 V of Acetic Acid = 60.05 1.00 g / mL 1000 = 0.06 L V = 0.06 L M = 0.06 × 0.88 M = 0.053 Molesof NaOH = volume 1000 ×concentration Molarityof NaOH = 0.25 M / L M NaOH = 250.00 mL / 1.00 M 1000 × 0.06 L
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