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The Reaction of Bleach and Food Coloring: Procedure

Updated on June 20, 2014
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  1. Take 20 ml of bleach in a beaker, a separate beaker, and a stock solution of food coloring in a beaker (see Step 2) and keep them in the freezer at the beginning of the experiment. Also, take a beaker, a separate beaker, and a stock solution of food coloring (see Step 2) and keep it outside. Also, make sure you have blue food coloring.

  2. For your food coloring stock solution, combine 1 ml of food coloring with 20 ml of water in a beaker. This is the stock solution that you are going to put in the freezer. Then do the same step and create another exact stock solution of food coloring that you are going to use for the experiment outside. Do not put this second stock solution in the freezer.

  3. Now while you wait 5-7 minutes for the beakers and solutions to become cold in the freezer, perform the experiment outside. Take the 5 ml of the stock solution of the food coloring outside and combine it with 5 ml of bleach outside. Record the time it takes for the reaction to occur. Repeat this step two more times. Before each repeat rinse the beaker in which the reaction took place.

  4. Observe the changes and the times of the reactions.

  5. Now quickly take out the materials from the freezer and combine 5 ml of the stock solution of food coloring with 5 ml of bleach on the lab bench. Record the time it takes for the reaction to occur.

  6. Once the reaction is over rinse the beaker in which the reaction took place and put it back into the freezer along with the beaker of bleach and the stock solution of food coloring. Wait 1-2 minutes and take the materials out again and repeat step 5.

  7. Repeat step 6.

  8. Observe the reactions and the times of the reactions.

  9. Rinse all the beakers used the in experiment. This is the end of Day 1.

  10. Now make two more stock solutions of food coloring. For the first one use 1 ml of food coloring for 30 ml of water and for the the second one use 1 ml of food coloring for 12 ml of water.

  11. In a beaker, combine 10ml of the the 3 ml per 30 ml of water stock solution with 10 ml of bleach. Record the time it takes for the reaction to occur. Observe the speed of the reaction. Rinse the beaker in which this reaction took place in and repeat this step 2 more times.

  12. In a beaker, combine 3 ml of the the 3 ml per 12 ml of water stock solution with 3 ml of bleach. Record the time it takes for the reaction to occur. Observe the speed of the reaction. Rinse the beaker in which this reaction took place in and repeat this step 2 more times.

  13. After you have recorded all observations and data, clean all materials and put them away.

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