The layer of fat in the pans used for manufacturing soaps can be removed by adding boiling washing soda solution. How will you account for it ?

Permanent hardness can be removed by boiling water with washing soda.

Give balanced equations to show how - Permanent hardness in water can be removed by addition of washing soda

In the blast furnace for manufacturing iron, most of the reduction is carried out by CO rather than C (coke). How can you account for this?

Certain amount of washing soda crystals are exposed to atmosphere, a loss in weight was noticed. How can you account for this ?

What are the raw materials used for the manufacture of washing soda by Solvay process?

Soap is the sodium salt of a long chain fatty acid, Sodium salt stearic acis is soluble in water, whereas calcium and magnesium salts are insoluble, so when soap is added to soft water, it dissolves and forms lather readily. Temporary hardness in water can be easily removed by boiling. Permanent hardness can be removed by the addition of washing soda, Calgon process, ion exchange process. The degree of hardness of a sample of water containing 6 mg of magnesium sulphate (other salts are absent) per kilogram of water is

Soap is the sodium salt of a long chain fatty acid, Sodium salt stearic acis is soluble in water, whereas calcium and magnesium salts are insoluble, so when soap is added to soft water, it dissolves and forms lather readily. Temporary hardness in water can be easily removed by boiling. Permanent hardness can be removed by the addition of washing soda, Calgon process, ion exchange process. Calgon contains