Introduction:
Distilled water and rainwater are both forms of water, but they differ in their electrical conductivity. Distilled water is known for its low conductivity, while rainwater can conduct electricity to some extent. The difference in conductivity between these two types of water is primarily due to the presence of impurities and dissolved substances.

Distilled water:
Distilled water is produced through a process called distillation, where impurities and minerals are removed by boiling water and condensing the steam. This process eliminates most of the dissolved substances, leaving behind pure water molecules. As a result, distilled water has a very low concentration of ions and other impurities, making it a poor conductor of electricity.

Conductivity and ions:
The ability of a substance to conduct electricity is closely related to the presence of ions. Ions are electrically charged particles that are formed when atoms gain or lose electrons. In water, various substances can dissolve and dissociate into ions, allowing them to carry electric charge and enable conductivity.

Rainwater:
Rainwater, on the other hand, contains dissolved substances and impurities that increase its electrical conductivity compared to distilled water. As rainwater falls through the atmosphere, it can pick up various gases, dust particles, and pollutants. These substances can dissolve in the rainwater, forming ions that enhance its conductivity.

Atmospheric gases and pollutants:
The atmosphere contains gases like carbon dioxide, nitrogen, and oxygen. When rainwater comes into contact with these gases, it can react chemically and form weak acids such as carbonic acid. These acids can dissociate into hydrogen ions (H+) and other ions, increasing the electrical conductivity of the rainwater.

Additionally, pollutants present in the atmosphere, such as sulfur dioxide and nitrogen oxides, can dissolve in rainwater and form acidic solutions. These acidic solutions further enhance the conductivity by increasing the concentration of ions in the water.

Conclusion:
In summary, distilled water does not conduct electricity effectively due to its lack of dissolved ions and impurities. On the other hand, rainwater can conduct electricity to some extent because it contains dissolved substances and impurities acquired from the atmosphere. The presence of ions, especially hydrogen ions from weak acids and pollutants, enhances the electrical conductivity of rainwater.

bcoz distilled water cannot break down in H+ ions