Acid Contents of Pepsi Products

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Exploring the acid content of Pepsi products
Lab performed: February 27, 2012,
March 12, 2012, and
March 19, 2012

The purpose of this experiment was to discover the unknown concentration of acid in six different Pepsi products; Pepsi, Diet Pepsi, Dr. Pepper, Diet Dr. Pepper, Pepsi Wild Cherry, and Pepsi Max. Titrations find the point at which equal moles of a known concentration react with equal moles of an unknown concentration giving the equivalence point. Also, the pKa was observed which conveys the equivalence point by graphing the results and determining where each equivalence point happened. Introduction:

Phosphoric acid is contains the high levels of sugar in all sodas. What people don’t know is that phosphoric acid is extremely harmful for one’s body. Not only is it used for sugar in soda’s but also in rust removal chemicals. Phosphoric acid lowers the bone density by not allowing enough calcium to be produced in the body. Once there isn’t enough calcium, the body will naturally start taking calcium from other parts of the body from bones to teeth. This will cause both teeth and bones to become weaker and possibly cause bone fractures, diseases in the body, and also can cause arthritis. Hypothesis of this experiment is, soda’s containing no or little sugars such as Pepsi Max has a higher acid content than those in which contain sugars such as regular Pepsi. Experimental Details:

Materials/Equipment needed:
* Dr. Pepper, Diet Dr. Pepper, Diet Pepsi, Pepsi,
Pepsi Wild Cherry, Pepsi Max
* Vernier pH tester
* Burette
* 6-250 mL beakers
* 1-600 mL Beaker (waste)
* 50 mL graduated cylinder
* 10 mL graduated cylinder
* Rind Stand
* Utility clamp
* Stirring bar
* Hot Plate
* 1 L Volumetric Flask
Chemicals needed:
* .0500 M KOH
Week 1: Prepare the solution of .0500M KOH using a volumetric flask. Determine exactly how much KOH will be needed for all titration. Once the KOH...
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