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Testing antacids. The purpose of this investigation is to test different antacids mild base that can neutralize acid - for their effectiveness in neutralizing stomach acids, to see if all antacid tablets are equally effective, and to learn the way of

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Purpose: The purpose of this investigation is to test different antacids - mild base that can neutralize acid - for their effectiveness in neutralizing stomach acids, to see if all antacid tablets are equally effective, and to learn the way of comparing antacid tablets in their acid- neutralizing ability to baking soda. Hypothesis/ Prediction: The most effective antacid will be Gaviscon and the least effective one will be Alka-Seltzer. All antacid tablets will not be equally effective. Data Recording, Processing, and Presenting Drops and Volumes of 6 antacids till it neutralizes Total Mass (g) Mass of each used (g) Number of drops and volume of HCL used (ml) Number of drops and volume of acid neutralized(ml)/g Number of drops and volume of acid neutralized per tablet (ml) Sodium Bicarbonate (Baking Soda) Cannot be measured 0.200g 105 drops 5.6 ml 525 drops 28 ml/g Cannot be measured Alka- Seltzer 3.202g 0.200g 72 drops 4.5 ml 360 drops 22.5 ml/g 1153 drops 72.045 ml Tums 1.292g 0.200g 58 drops 3.7 ml 290 drops 18.5 ml/g 375 drops 23.902 ml Rolaids 1.502g 0.200g 50 drops 3.2 ml 250 drops 16 ml/g 376 drops 24.032 ml ...read more.


Maalox needed 14ml to neutralize one gram and 18.004ml to neutralize one tablet. At last, Gaviscon needed 6.5ml to neutralize one gram and 10.1855 ml to neutralize one tablet. Therefore, baking soda is more effective than other medication because it is very basic and this will speed up the process of neutralizing. Furthermore, the medication to prefer the least is Gaviscon which would not take much of effect. Procedure Antacids that were being tested are Sodium Bicarbonate (Baking Soda), Alka-Seltzer, Tums, Rolaids, Maalox, and Gaviscon. Their total masses are all different but the mass of amount of antacids were all 0.200g, the same. The amount of HCL should be on 0 on the scale of burette. 0.5 Molar HCL should go into the burette and 0.200g of an antacid that has been mixed with blue indicator and water should be in a flask. After all those materials are prepared, HCL in the burette should drop to the water and while it is dripping, the flask should be swirling around because if mixing by swirling is not completed, color changes will occur even though the color changes were not to be occurred when the mixing is completed. ...read more.


Tablet results include "Per gram" results multiplied by the total mass of the tablet. Because the total mass of the tablet is different from each other, it is impossible to compare each other. Therefore, regardless of the total mass of the tablet and the "per tablet" results, the answer for "per tablet" case would be alka-seltzer. Evaluation/ Improvements The plan is assessed to be satisfactory but the materials could be improved by having better equipment for measuring. No other skills were required and the procedure was generally acceptable. However, the quantity and quality of evidence were limited. The hypothesis was hard to predict because it was less likely to have an obvious answer with no evidence collected. The weaknesses of this lab are in the imprecise method of using burette by hand in the process of counting and measuring. Burette sometimes had given away a lot of hydrochloric acid without knowing how much has dripped because awareness of the timing of HCL coming out is unnoticeable. Therefore, there were less accuracy in counting drops, but the volume of acid neutralized was accurate. A bit of patience and cautiousness would have helped accurate counts. ?? ?? ?? ?? ...read more.

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