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pH levels in Soft Drinks

pH levels in Soft Drinks. by Rudi Aker, Bella Duncan, and David S. Acids in Soft Drinks. Phosphoric Acid ( H3PO4 ) CAS Registry number: 7664-38-2 Molar mass: 98.00g/mol. Citric Acid (C 6 H 8 O 7 ∙ H 2 O) CAS Registry number: 5949-29-1 Molar Mass: 210.14g/mol. Health Effects.

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pH levels in Soft Drinks

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  1. pH levels in Soft Drinks by Rudi Aker, Bella Duncan, and David S.

  2. Acids in Soft Drinks • Phosphoric Acid (H3PO4 ) CAS Registry number: 7664-38-2 Molar mass: 98.00g/mol

  3. Citric Acid (C6H8O7 ∙ H2O) CAS Registry number: 5949-29-1 Molar Mass: 210.14g/mol

  4. Health Effects • Soft Drinks There are virtually no health benefits in consuming this product due to the high levels of sugars and chemicals. However there are several risks when consuming this product. These risks include, but are not limited to obesity, osteoporosis, diabetes, tooth decay, and heart disease.

  5. Levels of pH in soft drinks • The pH levels in soft drinks range from 2.0-4.0, yet most fall between the range of 2.5-3.0. • Example: Pepsi has a pH level of 2.530 while Mug Root beer has a ph level of 4.038.

  6. Instrumentation – pH electrode • The instrumentation necessary for this analysis is the pH electrode. • The pH electrode works by measuring the activity of the hydrogen ions which produces an electrical charge. The electrode procedure is based on a principle that electricity develops when two different substances (of different pH) come together at opposite sides of the glass membrane.

  7. How To Carry Out the Analysis 1. Plug the pH electrode into the computer 2. Make sure the computer program has automatically turned on 3. Take the pH electrode and rinse it with distilled water (so there is no contamination) 4. Pat the pH electrode dry with paper towel 5. Place the pH electrode into the solution 6. Get the pH reading from the computer

  8. Analysis… 7. Take the pH electrode from the solution and rinse it with distilled water 8. Pat the pH electrode dry with paper towel 9. Place the pH electrode in a different solution 10 .Get the pH reading of that solution from the computer 11. Continue doing steps 7-10 until each solution has been tested

  9. Necessary Skills and Information A few things that we will need to know to preform this analysis are: • How to use the pH electrode • How to compare pH levels • How to calculate concentration

  10. Sources Phosphoric acid. (2011, November 17). Retrieved from http://www.chemistry-reference.com/q_compounds.asp?CAS=7664-38-2 Citric acid, monohydrate msds. (2011, November). Retrieved from http://www.sciencelab.com/msds.php?msdsId=9923495 Jacobson, M. F. (2005, June). Liquid candy. Retrieved from http://www.cspinet.org/new/pdf/liquid_candy_final_w_new_supplement.pdf Jain, P., Nihill, P., Sobkowshi, J., & Agustin, M. Z. (2007, February 21). Commercial soft drinks: ph and in vitro dissolution of enamel. Retrieved from http://www.agd.org/support/articles/?ArtID=923 Seitz, J. (2008). Designing with ph electrodes. Retrieved from www.national.com/assets/en/appnotes/national_AN-1852.pdf

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