State whether the following statement is true or false:
Scum is formed due to the reaction of soap with calcium and magnesium salts present in hard water.

(TRUE) The statement is True.
Soap consists of sodium or potassium salts of long-chain fatty acids.
When soap is added to hard water,which contains dissolved calcium $(Ca^{2+})$ and magnesium $(Mg^{2+})$ ions,these ions react with the soap molecules.
This reaction leads to the formation of an insoluble precipitate known as scum (or curd),which makes it difficult for soap to form a lather.