CHAPTER ONE
INTRODUCTION
1.1 BACKGROUND OF STUDY
Water is a clear, colourless, testless and odorless liquid that is essential for life. Water is among the natural resources that occupies 708 of the earth surface (Willy et al, 2008). The human body needs about three to four litres of water per day for its normal functions. Apart from drinking and body functions, man needs water for various purposes including for use in transportation, recreation, water disposal, hydroelectric system (Onyeagba and Isu 2009).
Water is a good solvent and is often referred to as the universal solvent. It is transparent in the visible electromagnetic spectrum. Aquatic plants can live in water because sunlight can reach them. Ultraviolent and infrared light is strongly absorbed. Chemically, water is made up of two moles of hydrogen and one mole of oxygen in the ratio 2:1 the boiling point of water (and all other liquids) is dependent on the barometric pressure. For example, at the top of mount. Everest water boils at 680C (1540F) compared to 1000C (2120F) at the sea level conversely, water deep in the ocean near geothermal vets can reach temperature of hand reds or degrees and remains liquid.
Water has the second highest molar specific of any known substance, after ammonia, as well as high heat of vaporization (40.65KJ mol-1). Both of which are a result of the extensive hydrogen bonding between its molecules these two unusual by buffering large fluctuation in temperature. Water plays a critical role in regulating body temperature, it carries nutrients throughout the body, it improves digestion, it eliminates waste and toxins from the body.
PHYSIOCHEMICAL PROPERTIES OF SACHET WATER IN ABA
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