Claudia L.

asked • 03/02/17

Can the vitamin c concentration in fresh orange juice increase after being boiled?

So I'm doing an experiment in Chemistry class for my assignment. The experiment is to boil orange juice at 2 minutes, 4 minutes and 8 minutes and investigate the vitamin concentration by titrating it. Given the research online, I expected the vitamin c concentration to decrease, but this was not the case. Some information about the experiment:
- we covered the beaker's top that contained orange juice with a paper towel so the steam wouldn't escape
- when titrating it, we put distilled water with the orange juice
- we used iodine in the burette
 
The result of titrating fresh raw orange juice was around 14ml of iodine
When we boiled it at 2 min, the result was 16
And this gradually increased the longer our orange juice was boiled.
 
Why is this happening?
 
Thanks
 

1 Expert Answer

By:

Klaas K. answered • 03/02/17

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