Question

Define osmotic pressure what is reverse osmosis how is it used for water purification

Answer 1

Answer:

osmotic pressure is the pressure that applied to the pure solvent to prevent it from passing into the given solution by osmosis.

reverse osmosis is the process by which solvent passes through the semipermeable membrane in the opposite direction to that of the natural osmosis.

osmotic pressure is the basis of filtering , a process commonly used in water purification. the water to be purified is placed in a chamber and put under an account of pressure greater than the osmotic pressure exerted by the water and the solutes gets dissolves in it.

Answer 2

$\huge{\underline{\textrm{\color{darkblue}{Reverse Osmosis:-}}}}$

• The direction of osmosis can be reversed if a pressure larger than the osmotic pressure is applied to the solution side. That is now the pure solvent flo out of the solution through the semi permeable membrane. This phenomenon is called reverse osmosis.
• The pressure required for the reverse osmosis is quite high. A workable porous membrane is a film of cellulose acetate placed over a suitable support .

• Cellulose acetate is permeable to water but impermeable to impurities and ions present in sea water. These days many countries use desalination plants to meet their potable water requirements.