Foamy Yeast Eruption

Introduction: Foamy Yeast Eruption

In this instructable, i will be demonstrating the chemical reaction between Hydrogen Peroxide and Dry Yeast.
This is a great experiment that i use when teaching my science class.

Step 1: Materials

Hydrogen Peroxide
An empty soda bottle
Dry yeast
Measuring cup
Empty cup
Small spoon
Measuring table spoon

Food coloring

Step 2: Pour the Peroxide

First, measure 3/4 of a cup of peroxide.

Then pour it into the soda bottle.

Step 3: Food Coloring

If you choose to, add food coloring to the bottle.(10-15 drops).

Step 4: Add Dishsoap

Add about two tablespoons of dish soap to the bottle.

Step 5: Shake It Up

Simply shake the mixture to blend all its contents

Step 6: Add the Yeast

Add about 2.5-3 tablespoons of dry yeast to the empty cup.
Then pour warm water in the cup as well.

Step 7: Mix It Up

Take the small spoon and mix the yeast until it becomes a watery substance like in the picture below.
(Note: I transferred the mixture to a larger cup for easier mixing)

Step 8: Ready for Action

Simply pour the yeast mixture into the soda bottle and watch it erupt.
Make sure to do this outside because it can get messy.

ATTN: The yeast i used was a year old, and was not as active as a new package of yeast would usually be. So in that case it was not as foamy as it should have been. i put a picture of what it usually looks like at the bottom.

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    sahaab noor
    sahaab noor

    8 years ago

    My science fair is on tue and i like this project but from where i can get hydrogen?? Any online website? Tell quick


    9 years ago on Introduction

    Have you ever done more than one color at once? I'm wondering if you took a bottle of red, yellow and blue and had them go off at the same time or close to the same time if the foam would mix and change colors. I'm an art teacher and I think it would be a really fun and memorable way to explain color mixing. If you haven't, I might give it a try and pass on any info I gain from it. :) Again, great 'able. I can't help but smile and think of Sheldon. (I LOVE the Big Bang Theory)


    9 years ago on Introduction

    Oh my this is funny! It reminds me of an episode of Big Bang! Well done!


    9 years ago on Introduction

    Very impressive. Does the mixture is hard after?


    9 years ago on Introduction

    1. your video is marked private.
    2. What is the chemical reaction going on? The yeast eating the hydrogen peroxide, waste gases when yeast is sterilized, soap frothing up?