1. Drinkable Iron BSC 231 Inquiry Activity By: Tim Klieber and Milica Leone

2. Why do we do this? To test for the presence of a chemical reaction in the different fruit juices and to understand the products of the reaction. To help students visualize iron concentration. Real life visualization of the amount of iron in different, commonly consumed fruit juices.

3. Safety Instructions DO NOT DRINK THE LIQUIDS Do not use sharpie on anything other than your cups Keep your goggles on at all times.

4. Activity Materials 9 clear plastic cups (5 for experiment, 4 for control) Sharpie 100ml graduated cylinder 120ml total of each of the following juices: apple, pineapple, cranberry, white grape (60ml of each for control and 60ml of each for the experiment) Pint jar 3 tea bags 500ml water

5. Procedure 1.Label each cup with the name of the juice and write control underneath. 2.Place 60ml of juice into the 4 ‘control’ cups. 3.Label second set of cups with “type of juice + tea”. 4.Put 60ml of each juice sample into its corresponding cup. 5.To the 4 experimental cups, add 60ml of tea to each and stir. Wash the spoon before you go to a new cup of juice. 6.Allow the cups from both groups to sit for 20 minutes undistrubed. 7.When 20 minutes is up, carefully lift each cup up and look through the bottom. 8.Record your results in the chart. 9.Allow the cups to sit overnight. When you get to class in the morning, observe your cups and record your results in the chart.

6. 20 Minute Results Top picture is of the control groups and the bottom picture is of the experimental groups.

7. Next Day Results Top picture is of the control group and the bottom picture is of the experimental group.

8. In Conclusion Results : Dark particles are seen in the pineapple juice after 20 minutes. Particles are seen in the cranberry juice after two hours. No particles form in the apple juice. Why does this happen? A chemical change takes place that is evident by the solid particles that form. The particles are not the color of the juices, 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 form in a faster time in the pineapple juice because it contains more iron. The quantity and speed of the formation of the dark particles indicates the quantity of iron in the juice.