Question

Give laboratory method for the preparation of oxygen.

Answer 1

Laboratory Preparation of oxygen

• In the laboratory, Oxygen is prepared from the Hydrogen peroxide(H₂O₂) which is added drop by drop from a funnel to Manganese dioxide(MnO₂), which is a catalyst in this reaction.
• In the reaction, we get Water and Oxygen.
• This method is used as it is a simple method and does not require energy to happen.

$\underset{\mathrm{Hydrogen}\mathrm{peroxide}}{2{\mathrm{H}}_2{\mathrm{O}}_2\left(\mathrm{l}\right)}\stackrel{{\mathrm{MnO}}_2}{\to }\underset{\mathrm{Water}}{2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}$

• Catalyst- A catalyst either increases or decreases the rate of chemical change but itself remains the same at the end of the reaction.