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Vitamin C Titration Presentation
Transcript of Vitamin C Titration Presentation
The fresh juices had generally more vitamin C in them than the store bought juice. Our Findings For our experiments, we used:
-fresh juice from one lemon
-fresh juice or water from one coconut
-Safeway Kitchens brand store-bought lemon juice
-Zola brand store-bought coconut juice Lemons! Background We found that... Conclusions By Camie Westfall and Hannah Herbert Store Bought Juices versus Fresh Juices IMPORTANCE:Vitamin C is an important nutrient for the body. Our Question: Does store bought lemon and coconut juice contain more Vitamin C than fresh lemon and coconut juice. Coconuts! References The chemical name for Vitamin C is Ascorbic Acid. We chose to test the vitamin C concentrations in lemons because they are a commonly known for their high vitamin C content.
We chose to test coconuts because they are a fruit known for many important nutrients, but less commonly know for their vitamin C content. "Volumetric Analysis of Vitamin C by Titration." - College Essays. Study Mode, May
2012. Web. 06 Mar. 2013.
http://www.studymode.com/essays/Volumetric-Analysis-Of-Vitamin-C-By-994826.html "Vitamin C." ChemSpider. RSC: Advancing the Chemical Sciences, n.d. Web. 06
Mar. 2013. http://www.chemspider.com/Chemical-Structure.10189562.html Extraction
For the lemon we use a juicer
For the coconut we used a drill to obtain the juice or water. Centrifuge In order to remove the pulp and other solids from all of the juices, we used a centrifuge machine for each sample. Filtration We filtrated both the fresh and store bought samples through a Buchner Funnel to get pure liquids of each sample in preparation for the titration Standardization of NBS Before titration we had to standardize NBS solution and calculate its molarity.
After finding the endpoint (4.8 mL of NBS) we calculated a molarity of 0.0115 M NBS Titration Lastly, we titrated each liquid sample with the NBS solution and recorded the endpoints of each sample in order to calculate the Vitamin C concentrations. C6H8O6 + C4H4BrNO2 C6H6O6 + C4H5NO2 + HBr WHY "Protocols: General Chemsitry Spring Projects." General Chemsitry Spring Projects.
Pacific University Chemistry Department, n.d. Web. 06 Mar. 2013. http://newton.ns.pacificu.edu/~chemweb/GeneralChem/FinalProjects/ **Note the color change at the equivalence point. We used extraction, centrifuge, filtration, standardization, and titration in the methods of our experiments. References "Vitamin C." ChemSpider. RSC: Advancing the Chemical Sciences, n.d. Web. 06
Mar. 2013. http://www.chemspider.com/Chemical-Structure.10189562.html "Protocols: General Chemsitry Spring Projects." General Chemsitry Spring Projects.
Pacific University Chemistry Department, n.d. Web. 06 Mar. 2013. http://newton.ns.pacificu.edu/~chemweb/GeneralChem/FinalProjects/ "Volumetric Analysis of Vitamin C by Titration." - College Essays. Study Mode, May 2012. Web. 06 Mar. 2013.
http://www.studymode.com/essays/Volumetric-Analysis-Of-Vitamin-C-By-994826.html Chemical Equation: Redox Reaction M(Ascorbic Acid) V(Ascorbic Acid) = M(NBS) V(NBS)