Instant Color Change Experiment | Iodine Clock Reaction

by RussianDude in Workshop > Science

9915 Views, 31 Favorites, 0 Comments

Instant Color Change Experiment | Iodine Clock Reaction

Cover.jpg
IODINE CLOCK REACTION | Instant Color Change Experiment

In this project, we will turn almost clear liquid into the dark in the blink of an eye. It takes a little preparation, and possible trip to the pharmacy, but it's worth it.

https://youtu.be/cB87Cyxqtg8

So Here's What We Need

Sequence 01.Still001.jpg
Sequence 01.Still002.jpg
Sequence 01.Still003.jpg
Sequence 01.Still004.jpg
Sequence 01.Still005.jpg
Sequence 01.Still006.jpg
Sequence 01.Still007.jpg
Sequence 01.Still008.jpg
Sequence 01.Still009.jpg
Sequence 01.Still010.jpg
  • 2 transparent glasses
  • 2 small plastic cups
  • Any container with warm water
  • Spoon for stirring
  • Potato or corn starch
  • 1 gram of Vitamin C
  • Tincture of iodine
  • Hydrogen peroxide (3%)
  • Syringes for exact dosing

Vitamin C, tincture of iodine, hydrogen peroxide and syringes are sold in any drugstore.

Vitamin C can be also purchased on iherb.com

Sequence 01.Still011.jpg
Sequence 01.Still012.jpg
Sequence 01.Still013.jpg
Sequence 01.Still014.jpg

Place 1 gram of vitamin C in a plastic cup and add 60 ml of warm water. The syringe will help to accurately measure the required volume.

Stir well to dissolve the powder completely.

Sequence 01.Still015.jpg
Sequence 01.Still016.jpg
Sequence 01.Still017.jpg

Next, prepare the liquid starch.

Mix 1 teaspoon of starch in a little cold water. Then add hot water and stir again.

The total amount to be 150 ml.

Sequence 01.Still018.jpg

Pour 60 ml of warm water in each glass.

Sequence 01.Still019.jpg
Sequence 01.Still020.jpg
Sequence 01.Still021.jpg
Sequence 01.Still022.jpg

In the first glass, add 5 ml of tincture of iodine and 10 ml of solution with vitamin C.

Note that iodine became transparent.

Sequence 01.Still023.jpg
Sequence 01.Still024.jpg
Sequence 01.Still025.jpg
Sequence 01.Still026.jpg

In a second glass mix 15 ml of hydrogen peroxide and 5 ml of liquid starch.

Preparation Is Over, Time to Move on to the Fun Part

Sequence 01.Still027.jpg
Sequence 01.Still028.jpg
Sequence 01.Still029.jpg
Sequence 01.Still030.jpg
Sequence 01.Still031.jpg
Sequence 01.Still032.jpg
IODINE CLOCK REACTION | Instant Color Change Experiment

Take 2 glasses and pour all the liquid from one glass to another. Do this several times. Put the glasses on the table and watch.

Be patient... It may take a few seconds to a few minutes before the liquid will change its color to dark.

Watch the video: https://youtu.be/cB87Cyxqtg8

This experiment is a chemical reaction called "Iodine Clock".

Roughly speaking it's a battle between the starch, which is trying to turn a dark color of iodine, and vitamin C, which does not do it. Finally, vitamin C is completely consumed and the result is instant color change.

By the way, if you add vitamin C, the liquid becomes colorless again.

This is one of the most simple, but at the same time the most impressive experiments. Try it yourself!

If you liked this project, don't forget to add to your favorites and share on social networks.


And please subscribe to my Youtube channel (in English):

http://www.youtube.com/channel/UCFdutCpuXNMkZMGP6FtrD-Q

If you haven't seen my previous project, be sure to check it out!