2: See the Vitamin C? CAUTION: DO NOT DRINK IODINE OR FOOD WITH IODINE
In this experiment, you'll find out how much Vitamin
C in your food. Having plenty of Vitamin C will help
you to have healthy teeth, gums, and blood vessels.
device in milliliters or cups
juice (or juice strained from a fruit)
food or liquid samples, such as milk or meat (but
it needs to be liquefied)
that can heat the mixture
1 tablespoon of cornstarch and pour into a drinking
glass. Add just enough water to make it pasty.
250 milliliters (3 1/8 cup) of water and pour this
into the same drinking glass.
the solution until the starch dissolves. You
may need to heat it in order to make it dissolve
75 milliliters (1 cup) of water and pour into a different
drinking glass. Then add ten drops of
starch to the water with the eyedropper. This
dilutes the iodine so it’s not as strong.
add enough iodine to this mixture that it reacts
with the starch and turns a darkish blue/purple.
measure 5 milliliters (1/10 cup) of the iodine/starch
mixture and pour into a separate drinking glass.
10 drops of the fruit juice. If the mixture
becomes clearer, there is Vitamin C present. Vitamin
C makes iodine lose its color.
can use the iodine solution to test some other drinks
and foods (liquefied or blended, of course!) The
clearer the mixture, the more Vitamin C there is. Make
sure you clean the eyedropper with water each time
you use it.