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Transcript

Extracting Bismuth from Pepto Bismol

Procedure Cont.

11)Decant the product of the reaction

12)Put the precipitate into the deflagration spoon

13)Heat the precipitate using a meker burner

Procedure

1)Grind 20 tablets of pepto bismol using mortar and pestle

2)Mass the contents

3) Add to 500mL beaker

4) Prepare a solution of concentrated hydrochloric 36mL and 218 mL of water.

5)Mix half the solution with all the tablets

6)Vigoursly stir for 5 minutes

7)When the beaker begins to overflow transfer into a beaker of 1000mL

8) Add the rest of the solution

9)Put paper towel under flask and use filter paper to filter out the solution

10)Add aluminum foil to the filtered solution

Experimental Design

A known mass of pepto bismol tablets are mixed with a known mass hydrochloric acid and water solution. The product is then filtered out using filter paper and then the solution is reacted with aluminum foil. The product is decanted and the precipitate is heated to melting point.

Materials/Apparatus

Observations

Apparatus

  • 20 tablets of Pepto Bismol
  • 500mL beaker
  • 1000mL beaker
  • 218mL water
  • 36mL hydrochloric acid
  • Filter paper
  • Paper towel
  • 100mL graduated cylinder
  • Funnel
  • Rubber Policeman
  • Deflagration spoon
  • Meker burner
  • Large Crucible
  • Mortar and pestle

Prediction

Experimental Error cont.

We predict that from the reactant mass of 5120mg that the yield of bismuth should be 2952mg.

C7 H5 Bi O4

Mass:84 5 210 64

Percentage yield: 210/363=0.58%

Mass of Pepto Bismol: 20x256mg=5120mg

Mass of product= 0.58%x5120mg=2962mg

Evaluation

Experimental Error

We are unsure if the product is only bismuth.

Also in the video the solution after the first separation was pink. Our solution was clear which means we might have used a different type of filter paper which could have led to more experimental error.

Conclusion

Research

Our prediction was inaccurate as our experiment did not provide a successful yield. This could be due to many sources of error. However, a logical next step would be to try a different type of filter paper.

We believe a large part of error was not re-filtering the precipitate and solution after we added the aluminum as shown in the video.

Question:

Will we be able to successfully extract bismuth metal from the over-the-counter medication known as pepto bismol?

Therefore our results are not conclusive.

Thechemlife. "Isolating Bismuth metal from pepto bismol." Online video clip.

YouTube. YouTube, 20 Feb. 2011. Web. 2 Dec. 2013.

<http://www.youtube.com/watch?v=Hp1fYtYEfo

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