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# SC156 Principles of Chemistry Unit 6 Assignment Indigestion and Titration: An Acid-Base Titration Imagine yourself as the lead analytical chemist at...

I do not know how or what equation to use to solve the problems see attachment

SC156 Principles of Chemistry Unit 6 Assignment Indigestion and Titration: An Acid-Base T it rat i on Imagine yourself as the lead analytical chemist at Kaplan Industries. Your first big assignment is to investigate the strength of several commercial antacids for the Food and Drug Administration (FDA). They have sent five antacids to be tested with a back-titration that works as follows: First, each antacid tablet is mixed with 40 mL of 0.1 M HCl—this acidic solution is the same stuff that is in stomach acid, and one antacid pill is nowhere near enough to neutralize all 40 mL of the acid. So, to see how much extra help each antacid pill needs to neutralize 40 mL of 0.1 M HCL, you add 0.05 M NaOH drop-by-drop to back-titrate the solution until the pH is neutral. What this means is that, the stronger the antacid tablet, the less NaOH it will take to help bring the acid to neutral. (In other words, the stronger antacid tablets counteract more of the original HCl, leaving the solution closer to neutral before the NaOH is added.) Here are your results: Maalox© Tums© Mylanta© CVS brand© Rennies© Mass of one dose 20.0 g 21.0 g 18.0 g 18.3 g 17.5 g antacid mL NaOH used in 24.1 mL 22.4mL 20.0 mL 19.9 mL 24.4 mL back- titration Based on these results, answer the following questions: 1. Which is the strongest antacid, on a single-dose basis? Which is the weakest? Explain and show your calculations. 2. Which are the strongest and weakest, on a by-weight (mass) basis? 3. When people do back titrations, they usually watch the solution for a color change when the solution becomes neutral. What might you have used in the above experiment to get this color change to happen in the solution? At what pH would the solution have been neutral? 4. If you had walked into the lab, only to discover that you only had 0.1 M sulfuric acid available to run your tests, how might this have affected

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