Web(a) Water is said to be hard when it does not easily lather with soap. (b) Temporary hardness of water can be removed by heating the water while permanent hardness cannot be removed by heating. (c) Addition of sodium trioxocarbonate (IV) into the water can effect the complete removal of hardness (d) Palm oil and ash. WebBase exchange process’ is a chemical method by which, softening of permanent hardness in water can be done on a large scale or for household purposes. It is the most popular and …

Hard Water - Chemistry LibreTexts

WebTemporary Hardness is due to the bicarbonate ion, HCO 3-, being present in the water. This type of hardness can be removed by boiling the water to expel the CO 2, as indicated by the following equation: Ca (HCO 3) 2 → ← CaCO 3 + CO 2 + H 2 O. Permanent hardness is due to calcium and magnesium nitrates, sulphates, and chlorides etc. WebTotal number of methods which can remove permanent hardness of water: (a) Clark's method , (b) Ion-exchange method (c) synthetic resin method (d) Calgon method (e) treatment with sodium carbonate ... and clothing, and contributing to the formation of scale on pipes and appliances. Therefore, it is often necessary to remove hardness from water ... toy cars pictures

Water soluble salt on exposure to the atmosphere absorbs ... - Toppr

WebRemoving of Temporary Hardness - The temporary hardness can be removed by the process like: Boiling - The process of heating any substance at its boiling temperature. Clarks … WebThe first step in that process is screening, which removes large debris such as sticks and trash from the water to be treated. Screening is generally used when purifying surface … toy cars price in pakistan