Beginning this week in Chemistry, we started and finished a lab which tested the concentration of Vitamin C in different juices by using a technique called a titration. Iodine was used as an indicator to turn the solution a dark blue to signal the endpoint of the reaction, as seen below:
Hamming and I were the ones who created the standard for this experiment which was used by everyone in this class, so hopefully it produced consistent enough results across the class. We found that it took the least amount of iodine to react with the pear nectar and the most amount of iodine to react completely with unsweetened grapefruit juice.
Gillian, first of all, thanks for creating the standard for all of us for this experiment! I'm pretty sure it worked well for everyone. Secondly, thanks for including those links explaining standards and titrations, they were really informative. Lastly, I am glad that your group concluded that it took the least amount of iodine to react with the pear nectar and the most amount of iodine to react completely with unsweetened grapefruit juice, because that is what my group got too. :)
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