Elephant’s Toothpaste Experiment
What main ingredient causes the bubbling reaction in the Elephant’s Toothpaste experiment?
Hydrogen peroxide
Two chemicals are used in the “fake blood” chemistry demonstration?
KI and FeCl₃
What is the smallest particle of an element that retains its properties?
Atom
What is the taste of most acids?
Sour
What is the role of yeast in the experiment?
It acts as a catalyst
What color change is observed when potassium iodide reacts with iron(III) chloride?
Colorless to red-brown
What is the pH value of a neutral substance like pure water?
7
Which of the following is a base?
A) HCl B) NaOH C) CO₂ D) H₂O
B) NaOH
Which gas is released during the decomposition of hydrogen peroxide?
Oxygen
What new substance gives the red-brown “blood-like” color in this reaction?
Iodine
Which of the following is a chemical change?
A) Ice melting B) Paper burning C) Water freezing D) Salt dissolving
Paper burning
What color does litmus paper turn in a base?
Blue
Why is dish soap added to the mixture?
To trap the gas and form foam
What type of chemical reaction occurs between KI and FeCl₃?
Redox (oxidation–reduction)
What type of reaction is the breakdown of hydrogen peroxide (H₂O₂ → H₂O + O₂)?
Decomposition
What is the pH range of acidic solutions?
0–6
The Elephant’s Toothpaste reaction is exothermic. What does that mean?
It releases heat
In this reaction, what happens to the iron and iodide ions?
Fe³⁺ is reduced to Fe²⁺, and I⁻ is oxidized to I₂
How does temperature affect the rate of most chemical reactions?
Higher temperature speeds up reactions
When an acid reacts with a base, what are the two products formed?
Salt and water