Vitamin C lab

Throughout the past couple of days we have been completing a lab labeled the Vitamin C lab. During this, our purpose was to measure out the concentration of Vitamin C in multiple different juices. In order to do this we used starch as an indicator and compared the number of drops required to change the color of the juice to the number of drops required to change the vitamin C standard. 

Here is a link to a website explaining a version of the lab in more detail:

http://www.outreach.canterbury.ac.nz/chemistry/documents/vitaminc_iodine.pdf

Here is a link to a website explaining calculating concentration: http://chemistry.about.com/od/lecturenotesl3/a/concentration.htm