vitamin C lab II

vitamin C lab II - 001314-035 TSAI Jau-Ann 1 Jau-Ann Tsai...

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001314-035 TSAI, Jau-Ann 1 Jau-Ann Tsai 001314-035 IB Chemistry Higher Level II Internal Assessment Vitamin C Exploration Lab
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001314-035 TSAI, Jau-Ann 2 Jau-Ann Tsai Jahn Vitamin C Exploration Lab 11 Mar 2010 Aim: To determine and compare the amount of vitamin C present in Tropicana orange juice and pure squeezed orange juice. Variables: Independent- Type of orange- Tropicana or pure squeezed orange juice Dependent- Amount of vitamin C Control- Materials: Tropicana orange juice Oranges Orange juice squeezer Iodine solution Burette Graduated cylinders 50 mL beakers Procedure:
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001314-035 TSAI, Jau-Ann 3 1. Measure 10 mL of Tropicana orange juice using a graduated cylinder. 2. Pour it into a 50 mL beaker. Add 4-5 drops of starch solution to the beaker. 3. Wash the 25 mL burette twice with distilled water and then once with the iodine solution. Then fill the burette with the iodine solution. 4. Titrate the Tropicana orange juice with iodine until the endpoint is reached. Accurately record the initial and final volumes of the iodine. 5. Repeat this process four more times. 6. Using a orange juice squeezer, squeeze out 50 mL of orange juice from an orange. 7. Measure 10 mL of squeezed orange juice using a graduated cylinder. 8.
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vitamin C lab II - 001314-035 TSAI Jau-Ann 1 Jau-Ann Tsai...

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