Keeping Water Clean with Chlorine

893 WordsJan 28, 20184 Pages
Introduction Water is the fundamental source of life on earth. Although water has one of the most unique properties it is the most abundant compound in the biosphere. It is the only substance known that exists naturally in its 3 stages, solid, liquid and gas and has the highest number of possible crystal structures. The formula for water is H20, it is composed of two hydrogen atoms and one oxygen atom, and because water has a net dipole the shape of the water is bent. Chlorine is naturally found as a gas which can be manipulated to different forms in Earths’ biosphere. In its natural form chlorine is a poisonous gas, which can has the potential to kill people if over 600ppm of chlorine is consumed. When chlorine is compressed and cooled to -100.98oCit forms into a transparent liquid. Chlorines gas is green and explosive, but when in a liquid form it becomes stable. Chlorine is a common yet fundamental chemicals used in modern day pools. Its unique properties makes it’s a common chemical used to sterilise pools, killing microorganisms and bacteria, rendering them oxidised and harmless. A reaction take place when chlorine is added to a water, forming hypochlorous acid (HOCL), Water and Cl- ions. Cl2(aq) + 2H20 ↔ HOCl(aq) + Cl-(aq) + H20 Equation 1 When the hypochlorous if formed it dissociated almost immediately into hydrogen ions (H+) and hypochlorite ions (OCl-). The following reaction occurs. 2H2O + HOCl(aq) ↔ H3O +(aq) + OCl-(aq) (pKA = 7.54) Equation 2 The
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