No one can drink iron? Well, if this is the answer, try this experiment and test for the presence of iron in fruit juices.
Things Required:
1-pint glass jar
3 tea bags
Pineapple juice
Apple juice
White grape juice
Cranberry juice
5 clear plastic glasses
Tablespoon
Directions:
Make a strong tea solution by placing the tea bags in the pint jar; then fill it with hot water. Allow the jar to stand for one hour. Pour 4 tablespoonfuls of each juice sample into a different glass, as shown in the illustration. Add 4 tablespoonfuls of tea to each glass and stir. Allow the glasses to sit undisturbed for 20 minutes.
Carefully lift each glass and look up through the bottom of the glass. Make note of the juice that has dark particles settling on the bottom of the glass. Allow the glasses to sit for two hours more. Again, look for dark particles on the bottom of the glasses.
This Is What Happens:
Dark particles are seen in the pineapple juice after 20 minutes. Particles are seen in the cranberry and white grape after two hours. No particles form in the apple juice.
Science Behind It:
A chemical change takes place which is evident by the solid particles that form. The particles are not the colour of the juices which is another indication that something new has been produced. Iron in the juices combines with chemicals in the tea to form the dark particles. More particles formed in a faster time in the pineapple juice because it contains more iron. The quantity and speed of the dark particles indicates the quantity of the iron in the juice.
