Catalysts and Reactions in Chemistry

The video explains the reaction between hydrogen peroxide (H2O2) and potassium iodide (KI), highlighting the decomposition of H2O2 into water and oxygen. It discusses the role of catalysts, such as catalase found in blood, and how KI can be used as an alternative catalyst. The video also mentions other compounds like MnO2 that can catalyze the decomposition of H2O2.

What are the products formed when hydrogen peroxide decomposes?

• Hydrogen and water

• Water and carbon dioxide

• Hydrogen and oxygen

• Water and oxygen

What is the role of catalase in the decomposition of hydrogen peroxide?

• It is a product of the reaction

• It acts as a reactant

• It speeds up the reaction without being consumed

• It slows down the reaction

What happens when hydrogen peroxide is applied to a cut on the skin?

• It forms oxygen bubbles

• It forms water

• It forms hydrogen gas

• It forms carbon dioxide

Why is potassium iodide written above the yield sign in the reaction equation?

• Because it is a reactant

• Because it is a product

• Because it is a catalyst and not consumed

• Because it is an inhibitor

Which of the following is true about catalysts in chemical reactions?

• They are consumed in the reaction

• They are always reactants

• They are always products

• They speed up reactions without being consumed

Which compound is mentioned as another catalyst for the decomposition of hydrogen peroxide?

• Sulfuric acid

• Calcium carbonate

• Manganese dioxide

• Sodium chloride

What is the primary function of a catalyst in a chemical reaction?

• To increase the amount of reactants

• To decrease the amount of products

• To change the reaction products

• To increase the reaction rate