Sodium hydroxide is a white solid, it is polar in nature and easily dissolved in water to form solution.The solution of sodium hydroxide are irritates to the skin and it gives the soapy feeling.

The solution of sodium hydroxide mostly used for the preparation of soap both in laboratory as well as in industries. The method of preparation of sodium hydroxide in laboratory are that, hydroxide reacts with calcium hydroxide to form calcium carbonate and sodium hydroxide.

In industries sodium hydroxide can be prepared by the electrolytic process in Nelson's cell.The physical properties of sodium hydroxide are that, it is white crystalline in nature. The melting point of sodium hydroxide are 230 degree centigrade. Sodium hydroxide reacts with hydrochloric acid to form sodium chloride and water.

Sodium hydroxide react with carbonates to form sodium carbonate and water. Sodium hydroxide react with ammonium chloride to form three products that are sodium chloride, water and ammonia.Sodium hydroxide reacts with chlorine to form sodium chloride. When sodium hydroxide react with fat to form soap and glycerine.

Sodium hydroxide used for the preparation of soap, glass, detergent. Sodium hydroxide is used in medicines and also for the preparation of baking powder.Sodium hydroxide is also used in the preparation of different chemicals.