how to reduce calcium hardness

It is the element that is present maximum in our body as it goes into the formation of the skeletal system. It is absorbed as calcium phosphate. In addition to formation of bones, the other functions of calcium are to help normal clotting of blood and the functioning of cardiac..

1. Take 3 ml of ash solution. 2. Add a few drops of 50% sulphuric aci..

Apparatus required: Water, 50% sulphuric acid, glass slides, cover slips, microscope, sections of chlorophyll-free leaf, blotting paper and droppe..

Water is said to be permanently hard when it contains sulphates and chlorides of calcium and magensium. Water becomes permanently hard when it passes over the rocks, which contain sulphates or chlorides of calcium and magnesium to form insoluble calcium..

However, oxides of potassium, sodium, calcium, magnesium and aluminium do not lose their oxygen in this manne..

It is known that soap is the sodium salt of stearic acid (C 1 7 H 3 5 COO - Na + , sodium stearate). When soap is added to hard water it reacts with the calcium and magnesium ions present in hard water. This forms an insoluble calcium or magnesium stearat..

Hard and Soft Water - Water is described as being 'hard' if it does not lather readily with soap. 'Soft water', on the other hand, is described as the one, which lathers readily with soap. Chemically, natural water is never pure and contains varying amounts of the dissolved impu..

Water is described as being 'hard' if it does not lather readily with soap. 'Soft water', on the other hand, is described as the one, which lathers readily with soap. Chemically, natural water is never pure and contains varying amounts of the dissolved impurities absorbed from the n..

All metals are hard except sodium and potassium, which are soft and can be cut with a knif..

When heated with calcium sulphide at 1475 K (1200C), it gives calcium oxide, and sulphur dioxide...