How is dioxygen prepared in laboratory from kclo3?

Question: How is dioxygen prepared in laboratory from kclo3?

Dioxygen (O2) can be prepared in a laboratory from potassium chlorate (KClO3) by a process known as thermal decomposition. This process involves heating the potassium chlorate to a high temperature, causing it to break down into its component elements. The reaction can be represented by the following equation:

2KClO3 → 2KCl + 3O2

To prepare dioxygen in the laboratory, the following steps can be taken:

Obtain potassium chlorate: Potassium chlorate can be purchased from a chemical supply company or found in some common household products, such as bleach and some laundry detergents.

Heat the potassium chlorate: The potassium chlorate is placed in a test tube or flask and heated over a Bunsen burner. The temperature should be high enough to cause the potassium chlorate to decompose, but not so high as to cause it to boil.

Collect the dioxygen gas: As the potassium chlorate decomposes, dioxygen gas is produced. The gas can be collected using a gas-collecting apparatus, such as a gas-tight syringe or a inverted test tube over water.

Purify the dioxygen gas: The dioxygen gas produced from the thermal decomposition of potassium chlorate may contain impurities such as nitrogen and other gases. To purify the dioxygen, it can be passed through a drying agent, such as a drying tube filled with desiccant, to remove the impurities.

By following these steps, dioxygen can be prepared in the laboratory from potassium chlorate. This process can be used to demonstrate the decomposition of potassium chlorate and to produce a pure sample of dioxygen gas.

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