Question

Manganese dioxide is required in the laboratory preparation of oxygen gas though it does not take a part in reaction. Give reason!

Answer 1

Answer: In the laboratory preparation of oxygen from potassium chlorate, manganese dioxide acts as a catalyst, i.e. it increases the rate of oxygen production without consuming itself.

Explanation:

• Manganese dioxide is a catalyst. This means that it accelerates the decomposition reaction $H_{2} O_{2}$→$H_{2}O + O_{2}.$ Since it is a catalyst, manganese dioxide is not consumed or chemically changed during the reaction
• Since it is a catalyst, manganese dioxide is not consumed or chemically changed during the reaction.
• Manganese dioxide acts as a catalyst in the laboratory preparation of oxygen from potassium chlorate, increasing the rate of oxygen generation without consuming it.
• When oxygen is produced in the laboratory from potassium chlorate, manganese dioxide acts as a catalyst to speed up the process without consuming any oxygen.
• Hydrogen peroxide is decomposed by manganese dioxide into oxygen and water. Manganese dioxide serves as a catalyst, so it is not metabolized during the reaction. As a result, the catalyzed rate is 1073 times higher than the uncatalyzed rate. decomposition of oxygen-rich substances. $2KMnO_{4}$heatK$2MnO_{4}+MnO_{2}+O_{2}.$
• Using manganese dioxide, oxygen is produced from hydrogen peroxide.
• Magnesium oxide serves as a catalyst in the laboratory process of producing oxygen gas from hydrogen peroxide gas.
• Oxygen is created using a catalyst, manganese dioxide.
• Although there are various ways to generate oxygen, hydrogen peroxide is chosen because it does not involve heat and is a simple procedure to obtain oxygen gas in the laboratory. Oxygen evolution occurs at a regulated and controlled rate.

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