Water is one of the most precious resource on Earth and is necessary for all living beings. We use water for different purposes like drinking, cooking, bathing, washing and many more activities. Pure water is colorless, odorless and tasteless.
The molecular formula of water is H2O and its molecular weight 18.
Solution: Solution is a uniform mixture of the solute and solvent. The dissolved substance e.g. sugar, copper sulphate in a solution is called solute. The substance which dissolves in the solute e.g. water is called solvent.
The boiling point and freezing point of water changes with change in pressure and by adding solute.
Water contracts when cooled upto 4oC but cooling below this temperature it expands. This property helps insulation of heat for aquatic animals in polar regions.
Solution is a homogeneous mixture of two or more components whose composition may be gradually changed by changing the relative amount of components. The concentration of a solution is given as mass percent and volume percent.
This module also covers the chemical nature of water, test for water and measures to control water depletion.
Learnhive Lesson on Water