1. Decomposition of Hydrogen Peroxide (H2O2):
a) In this method, hydrogen peroxide is decomposed into oxygen and water using a catalyst such as manganese dioxide (MnO2).
b) Place a small amount of MnO2 in a test tube or flask.
c) Add a small amount of concentrated hydrogen peroxide (30% H2O2) to the test tube, avoiding skin contact.
d) Oxygen gas will be rapidly released as a result of the chemical reaction between MnO2 and H2O2.
e) Collect the oxygen gas by placing an inverted test tube or a gas collection tube over the mouth of the reaction vessel.
2. Electrolysis of Water:
a) This method involves breaking water molecules into hydrogen and oxygen gases by passing an electric current through water.
b) Set up an electrolysis apparatus consisting of a beaker filled with water, two electrodes (usually made of platinum or carbon), and a power source (e.g., a battery).
c) Connect the positive electrode to one end of the power source and the negative electrode to the other end.
d) Turn on the power source to start the electrolysis process. Hydrogen gas will be collected at the negative electrode, and oxygen gas will be collected at the positive electrode.
e) Collect the oxygen gas by placing an inverted test tube or a gas collection tube over the positive electrode.
Remember to always follow proper safety precautions when handling chemicals in the laboratory, including wearing appropriate protective gear such as gloves and safety glasses. Additionally, always dispose of chemicals and waste according to your lab's safety protocols.
