Describe the working principle involved in Reverse Osmosis.

Reverse Osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water. Here's how it works:

1. Pre-filtration: Before the water enters the RO membrane, it goes through a pre-filtration process to remove large particles, chlorine, and other substances that could damage the membrane.

2. Pressurization: The water is then pressurized, which helps to push it through the RO membrane. This pressure is what gives RO its name – the water is forced to move from an area of high pressure (the unfiltered water side) to an area of low pressure (the filtered water side).

3. RO Membrane: The heart of the system is the RO membrane. This is a thin, semipermeable membrane that allows water molecules to pass through but blocks larger molecules like dissolved salts, bacteria, and other contaminants.

4. Post-filtration: After the water passes through the RO membrane, it goes through a post-filtration process to remove any remaining impurities. This usually involves a carbon filter, which can remove any remaining tastes or odors.

5. Storage and Delivery: The purified water is then stored in a tank until it's needed. When you turn on your tap, the water goes through one final post-filter to remove any remaining tastes or odors, and then it's delivered to your tap.

So, in summary, the working principle of Reverse Osmosis involves pressurizing unfiltered water, forcing it through a semipermeable membrane to remove impurities, and then storing and delivering the purified water.