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Tums And Up Antenacid As Effective In Neutralizing Acid

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Introduction:

The purpose of this lab is to if Tums and Up & Up antacid are as effective in neutralizing acid as they claim. The intended use of antacids is to neutralize gastric juices, the acidic content of a person’s stomach. The acid in gastric juices is hydrochloric acid. A antacid is a substance that neutralizes acid, like the acid in gastric juices. A neutralization reaction is a chemical reaction between an acid and a base which produces a neutral solution. (N.p., Neutralization Reaction). The active ingredient in both antacids was Calcium Carbonate. The balanced reaction between the HCl and the antacid was “HCl + C2CO3 -> CO2 + H2O + CaCl2”. Each tablet of Up and Up and Tums has enough antacid to neutralize 0.02 moles of …show more content…

We placed this beaker on a stirring plate. We then poured 40 mL of 0.2M NaOH into the 60 mL buret. Two drops of phenolphthalein were added to the beaker containing gastric juices. Phenolphthalein is an indicator that turns neutralized mixtures pink. After that, we turned on the stirrer in the gastric juices to mix the solution. We then slowly poured NaOH into the beaker until the solution neutralized, turning the indicator pink. The mixture would need to stay pink for 30 seconds. The paler the pink, the more accurate the measurements. We then recorded the remaining amount of NaOH in the buret. This process was repeated for the Up & Up gastric …show more content…

The first calculation we used was to calculate the number of moles NaOH added to each of the antacid samples. We used the average amount of NaOH added to solve this equation. The equation for the Tums is: .0013 L X .2m = .00026 mol NaOH. The equation for Up and Up is: .00075 L X .2m = .00015 mol NaOH. We then calculated the number of moles of HCl that were present at the start of the titration. The equation for the Tums and the Up and Up is:
We then calculated the number of moles of HCl that were neutralized by the antacid. To do this we took our answers from the other equations and subtracted them. The two equations for the two antacids are:
We then calculated the molarity of the mixture before titration using one of our answers from before. The two equations for the Tums and Up and Up are:
We then calculated the percent error for each antacid using the number of moles expected to be neutralized, theoretical yield, and the number of moles actually neutralized, experimental value. The equations for the both

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