Sodium in sports drinks
Purpose
The purpose of this experiment was to determine the amount of sodium ions in a sample of a sports drink using the Mohr Titration method.
Results
Sodium in Gatorade
For Sample 1:
Per 10 mL x 0.03425% = 0.003425 g = 3.425 mg
Per 591 mL x 0.03425% = 0.2024 g = 202.4 mg
For Sample 2:
Per 10 mL x 0.04427% = 0.004427 g = 4.427 mg
Per 591 mL x 0.04427% = 0.2616 g = 261.6 mg
Comments
It is probable that in the first sample of the sports drink titration that we went beyond the actual endpoint since the color was produced and persistent when we used only 1.5 mL of the titrate. However, from our calculations we determined that the second sample was closer to the actual label of Gatorade at 261.6 mg sodium per serving versus the actual 270 mg reported by Gatorade. It is possible that the calculation in molarity of the AgNO3 titrate was inaccurate since we may have under or over estimated the amount of titrant need to titrate the KCl. Also, it is possible that the samples may have been contaminated by the KCl used in the standard that was done prior to the sports drink titration, which could have produced a false end point.
The purpose of this experiment was to determine the amount of sodium ions in a sample of a sports drink using the Mohr Titration method.
Results
Sodium in Gatorade
For Sample 1:
Per 10 mL x 0.03425% = 0.003425 g = 3.425 mg
Per 591 mL x 0.03425% = 0.2024 g = 202.4 mg
For Sample 2:
Per 10 mL x 0.04427% = 0.004427 g = 4.427 mg
Per 591 mL x 0.04427% = 0.2616 g = 261.6 mg
Comments
It is probable that in the first sample of the sports drink titration that we went beyond the actual endpoint since the color was produced and persistent when we used only 1.5 mL of the titrate. However, from our calculations we determined that the second sample was closer to the actual label of Gatorade at 261.6 mg sodium per serving versus the actual 270 mg reported by Gatorade. It is possible that the calculation in molarity of the AgNO3 titrate was inaccurate since we may have under or over estimated the amount of titrant need to titrate the KCl. Also, it is possible that the samples may have been contaminated by the KCl used in the standard that was done prior to the sports drink titration, which could have produced a false end point.