end point in titration for Vitamin C content
Moderators: kgudger, Moderators
-
- Posts: 1
- Joined: Sun Jan 24, 2010 6:28 pm
- Occupation: student 4th grade
- Project Question: Which fruits and vegetable have most vitamin C
- Project Due Date: Feb. 4, 2010
- Project Status: I am conducting my experiment
end point in titration for Vitamin C content
I am testing fruit and vegetable juices for vitamin c content. I made a starch solution with iodine which makes a dark blue color. So this solution to I add drops of fruit juice. The end point is when the blue solution turns clear. The fewer drops required to change the indicator soution clear, the greater the amount of Citamin C in the liquid. When I put a drop of spinach juice in the indiator solution, it turned bright green immediately and I never reached a clear color. I don't know what this means. Can you help me determine how to interpret this result.
-
- Former Expert
- Posts: 154
- Joined: Fri Nov 19, 2004 8:55 am
Re: end point in titration for Vitamin C content
For the spinach test you may need to dilute the spinach extract 50% to get a reading. Mix 1 volume spinach extract with 1 volume water to get a reading. If still too concentrated mix one volume spinach extract with 9 volumes of water.
Good luck,
Matthew W. Mulanax
Good luck,
Matthew W. Mulanax