1. Dissociation of Water:
- Water molecules (H2O) consist of two hydrogen atoms bonded to one oxygen atom.
- When an electric current is applied, the water molecules dissociate into hydrogen (H2) and oxygen (O2) gases through a process called electrolysis.
2. Formation of Hydrogen and Oxygen:
- Hydrogen gas (H2) is produced at the cathode (negative electrode), where positively charged hydrogen ions (H+) gain electrons and are reduced to form hydrogen gas molecules.
- Oxygen gas (O2) is produced at the anode (positive electrode), where negatively charged hydroxide ions (OH-) lose electrons and are oxidized to form oxygen gas molecules.
3. Gas Bubbles:
- As hydrogen and oxygen gases are produced, they form visible bubbles that rise to the surface of the water.
- The bubbles consist of pure hydrogen and oxygen gases, which can be collected and utilized for various applications.
4. pH Changes:
- During electrolysis, the water near the cathode becomes slightly alkaline due to the accumulation of hydroxide ions (OH-), while the water near the anode becomes slightly acidic due to the formation of hydrogen ions (H+).
5. Chemical Reactions:
- Electrolysis can also facilitate other chemical reactions in the water. Dissolved minerals, salts, and impurities present in the water may react with the produced hydrogen and oxygen gases, forming new compounds or substances.
6. Electrolytes:
- Pure water is a poor conductor of electricity, but the presence of dissolved salts, acids, or bases in the water allows the electric current to flow more easily. These substances are known as electrolytes.
7. Corrosion:
- The electrodes used in electrolysis can undergo corrosion due to the chemical reactions and oxidation-reduction processes occurring during electrolysis.
It's important to note that the specific reactions and outcomes during electrolysis may vary depending on the water quality, dissolved substances, electrode materials, and other experimental conditions.
