The Sci Guys: Science at Home - SE2 - EP13: Elephant Toothpaste

Welcome to the thirteenth episode of season 2 of The Sci Guys. In this episode we will be mixing hydrogen peroxide and yeast, to produce a hot foam known as elephant toothpaste. We will show you how a catalyst can accelerate the decomposition of hydrogen peroxide to make elephant toothpaste. At the end of this video you will be able to demonstrate with an experiment how to make elephant toothpaste and how adding a catalyst to a chemical reaction can accelerate the reaction.

Equipment and Ingredients:
Hydrogen Peroxide (3%, 6% or 12% Concentration)
Dry Yeast
Dish Soap
Food Colouring
Mixing Bowl
Measuring Cups and Spoons
Cake Tin
Beaker, Glass or 2L Pop Bottle
Goggles
Gloves
Apron or Lab Coat

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[tatjanab]

This was a great explanation! I love that you include the formulas and the elements! Thanks!

[techyrelic]

I saw these in school and now I just love watching them and recreating them at home

[AlexanderRodriguez-elso]

For your elephant toothpaste experiment to work fully, I have figured out that your warm water and dry yeast mixture has to be the same thickness/consistency as over the counter cough syrup.

[leemajackulinemani]

thank you for this wonderful video I really appreciate the explanation. I took an hour searching for the elephant toothpaste video with an explanation and I took a view of this video but and I was so delighted that I finally found a video that was perfect for my science expo thank you so much.

[empresskuzco]

Thank you! It's hard to find a proper explanatory elephant toothpaste experiment video! 
You guys did great!

[panjakeu]

Is it okay to dissolve the yeast with not warm water?

[annalieherrera]

I'm doing this for a science fair 👍

[TheRaminopeters]

how long does it take to activate the yeast

[pri]

Umm from where can you get hydrogen peroxide?

[alexzandreconstantine]

How did you make a 12% solution from 3%?

[Aliante]

That was great!!! We'll be doing this at home. Having the science behind it explained so well is very helpful. Thank you!

[jaydenleung]

Absolutely amazing video, helped my science project drastically

[GardeningIndo]

im so sorry i just tried it again and it worked thank you so much for answering my questions it means a lot to me thank you

[bakuldafada]

can we use normal water to make yeast paste

[GardeningIndo]

i tried to dilute the 50% hydrogen peroxide with water but it still didn't work i don't now what I'm doing wrong. but how much water should use with the hydrogen peroxide 50%.should it be like 50/50 or something else ?

[weatherinformer]

Sir the way you explain the things is very good and can you please upload drain cleaner and aluminium foil reaction

[ahovig]

Is it safe for children to play with this foam/elephant toothpaste after it cools down?

[rosalynpriceenglish]

Thank you for your video! I'll be using it in our homeschooling science class this coming Friday!

[GardeningIndo]

ok i just tried it. this time it gives a bit of foam but only like 2 cm above the mixture .was it because i didn't use enough soap or to much yeast or is it because of the mixture?

[renshifter]

can you touch the foam if you use 6% hydrogen peroxide?