Saturday, 13 June 2009

"Shaving foam"

Decomposition of H2O2 :

To carry that experiment you need:

  • high buret
  • 30% hydrogen peroxide (perhydrol)
  • solid potassium or sodium iodide ( KI or NaI)
  • soap powder
BE CAREFUL! 30% HYDROGEN PEROXIDE IS VERY CORROSIVE!

Pour perhydrol into the buret (about 1/5 of its height), then pour the soap powder -
about 1 teaspoonful. Mix the soap with the liquid.

After that add 1/2 of teaspoonful of solid potassium iodide. Be carefull because foam appears very quickly and it could make some brown stain - it contains iodine I2 .

3H2O2 + KI = 3H2O + KIO + O2

2KIO + H2O2 = I2 + 2KOH + O
2


Oxygen causes a lot of foam if soap is mixed with perhydrol before adding KI.


http://www.youtube.com/watch?v=OKUgIKPPwhE

video

3 comments:

Manuel Díaz Escalera said...

Fantastic experiment(and a very good song)

Greetings from Spain

Claudia Cziprok said...

This experiment is very spectacular. Good job! Congratulations Tymoteusz and Poland team!

Nagesh shukla said...

Thank you for the blog, this was very heplful keep it up!!!

Potassium Iodide