Question

State 5 uses of salt in chemistry​

Answer 1

Salt or Sodium chloride (NaCl ) has different uses such as water softening, precipitation, electrolysis, flame test, and Desiccation

The scientific name of common salt is Sodium chloride (NaCl) obtained by the neutralization of hydrochloric acid (HCl) and Sodium hydroxide (NaOH). It has different uses such as:-

1. Water Softening:- it is formed by ion exchange process. as calcium and Magnesium are present in hard water which is replaced by sodium ion.
2. Precipitation :- Salt is used to precipitate certain compounds example the addition of silver nitrate to a solution of sodium chloride will result in the formation of a white precipitate of silver chloride.
3. Electrolysis:- NaCl is used as a electrolyte in electrolysis process to disassociate water in hydrogen and oxygen gases.
4. Flame test :- it is done to identify presence of some elements and distingush between some compounds such as to diffrentiate between KCl and NaCl flame test is performed. NaCl produces Yellow flame while KCl produces brick red flame.
5. Desiccation: Salt can be used as a desiccant to absorb moisture from the air. This is often used in laboratory settings to maintain a dry environment.