The chemical equation, KClO3 → KCl + O2, is an example of which type of reaction?
The Correct Answer and Explanation is:
The chemical equation KClO3 → KCl + O2 is an example of a decomposition reaction.
In a decomposition reaction, a single compound breaks down into two or more simpler substances. This is the opposite of a synthesis reaction, where multiple reactants combine to form one product.
Let’s break down the reaction in more detail:
1. Reactant: Potassium Chlorate (KClO3)
- Potassium chlorate is a compound made up of potassium (K), chlorine (Cl), and oxygen (O).
- Under certain conditions, potassium chlorate decomposes, typically in the presence of heat or a catalyst, to form simpler products.
2. Products: Potassium Chloride (KCl) and Oxygen Gas (O2)
- Potassium chloride (KCl) is a salt, and oxygen (O2) is a diatomic gas.
- The decomposition of KClO3 produces these two products when it breaks down.
Why Is This a Decomposition Reaction?
- Single reactant: The reaction starts with only one reactant, KClO3.
- Multiple products: The reaction results in the formation of more than one product: KCl and O2.
- Energy requirement: Typically, decomposition reactions require an input of energy, such as heat. In this case, heating KClO3 causes it to break down.
Decomposition Reactions in General:
- Decomposition reactions can be thermal (requiring heat), electrolytic (requiring an electric current), or occur in other ways. In the case of potassium chlorate, heat is often applied to facilitate the breakdown.
- Another well-known decomposition reaction is the breakdown of hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2) when it decomposes.
This type of reaction is important in various industrial and laboratory processes, such as producing oxygen gas or creating chemical reactions for energy release.
