What is the difference between temporary hard water and permanent hard water?
Water is said to be soft, if it readily forms lather with soap. Pure water or water containing sodium salts easily gives lather with soap. Such a water sample is called 'soft water' and is suitable for use. Distilled water and rain water are example of soft water. Water is said to be hard when it does not readily form lather with soap. There are two types of water hardness: temporary hardness and permanent hardness. Temporary hard water is water that only contains calcium and magnesium hydrogen carbonates. Because its hardness can be removed simply by boiling, it is referred to as temporary hard water. When water readily forms lather with soap, it is said to be soft. Soap lathers easily with pure water or water containing sodium salts. This type of water is known as'soft water,' and it is suitable for use. Soft water includes distilled water and rainwater. When water does not readily form lather with soap, it is said to be hard.
