What is a testable question for elephant toothpaste?
To make it a true experiment, you can try to answer these questions: Does the amount of yeast change the amount of foam produced? Will the experiment work as well if you add the dry yeast without mixing it with water? Does the size of the bottle affect the amount of foam produced?
What is the conclusion for elephant toothpaste?
Our hypothesis stated that the trial using the 30% solution would be the fastest and it was proven correct. It was the fastest because it had more pure hydrogen peroxide making it have more oxygen when broken down and pushing the foam out faster.
What makes elephant toothpaste react faster?
Elephant’s toothpaste is a foamy substance caused by the rapid decomposition of hydrogen peroxide using potassium iodide or yeast and warm water as a catalyst. How rapidly the reaction proceeds will depend on the concentration of hydrogen peroxide.
What are the variables of elephant toothpaste?
Variables: Controlled Variables: Variables that will remain the same is the amount of hydrogen peroxide, the size of the bottles used and the amount of catalyst used. Independent Variables: The independent variables in the experiment are both the catalysts added to test 2 and test 3 to change the rate on reaction.
What makes the elephant toothpaste rise?
What makes the foam appear? When the hydrogen peroxide comes into contact with the yeast it starts breaking down into water and oxygen. Oxygen is a gas and therefore wants to escape the liquid. The dish soap that you added to your reaction, however, traps these gas bubbles, forming a foam.
Why does my elephant toothpaste not work?
Yeast needs warm water to reproduce, so the reaction won’t work as well if you use cold water (no reaction) or very hot water (which kills the yeast).
What is the objective of the Elephant Toothpaste experiment?
Objective: This is a demonstration showing that chemical reactions can occur faster when a catalyst is added. A catalyst reduces the amount of energy needed for the reaction. Chemical reactions occur in our body all the time and are often sped up with a catalyst.
What is the purpose of the Elephant Toothpaste experiment?
Elephant’s toothpaste is a foamy substance that’s created when you combine water, hydrogen peroxide, yeast, and dish soap. It is commonly used in classrooms to demonstrate an exothermic reaction. More recently, it’s been used at the 2019 Miss Virginia pageant and for gender reveals.
What are the independent and dependent variables in Elephant Toothpaste?
The independent variable is the temperature of the water used. The dependent variable is the foam produced in the reaction. The controlled variable are the amounts of yeast, hydrogen peroxide, dish washing liquid, water, and food coloring that is used.
What caused the foam in this experiment?
During this experiment, the yeast acted as a catalyst to remove oxygen from the hydrogen peroxide. This process was done very fast, causing a lot of bubbles to be formed. The bottle became warm throughout this process creating an exothermic reaction! It not only created foam, but also heat!
How hot can elephant toothpaste get?
The 500 ml of water has a heat capacity of around 2100 J/K. So, the solution gets about 12 K hotter. This calculation seems to assume 3% hydrogen peroxide. A good elephant-toothpaste demo will use 30%, which of course produces ten times the energy.
Which catalyst is best for elephant toothpaste?
potassium iodide
When catalyzed, the rate of decomposition of the hydrogen peroxide increases. Suitable catalysts include yeast, manganese dioxide, “rusty” manganese metal and potassium iodide.
Why does my Elephant Toothpaste not work?
What is the controlled variable in the elephant toothpaste experiment?
What gas do you think caused the bubbles to form in our elephant toothpaste?
The oxygen gas forms bubbles. These bubbles would usually escape from the liquid and pop quickly. But, adding a little dish soap provides additional surface tension, allowing the bubbles to get trapped and creating lots of foam. This foam looks like a giant squeeze of toothpaste—almost big enough for an elephant!
What is the purpose of the elephant toothpaste experiment?