The water is referred as ‘hard water’ when it contains more minerals than ordinary water. These are especially the minerals calcium and magnesium. The degree of hardness of the water exceeds, when more calcium and magnesium dissolve. Magnesium and calcium are positively charged ions. Because of their presence, other positively charged substances will dissolve less easy in hard water than in water that does not contain calcium and magnesium. This is the cause of the fact that soap doesn’t really dissolve in hard water.

Bottled water is water which has been packaged in sealed containers for human consumption. The water can come from a variety of sources including springs, aquifers, or municipal supplies and may be treated to make it fit for human consumption.