Introduction:
A reversible chemical reaction is a reaction which can proceed in both the forward and backward directions which can be represented by the symbol . A reaction comes to equilibrium when the rate of reaction of the reactants is equal to that of the rate of reaction of the products. An example of a reversible chemical reaction is one which occurs in the pool between chlorine and water (Deb Smith, 2006). Equation 1
A reaction takes place with water to produce hypochlorous acid, HOCL and chloride ions Cl-.
The hypochlorous acid slowly begins to separate into hydrogen and hypochlorite ions (OCL-). This can be modelled into an equation (Deb Smith, 2006). Equation 2
The presence of H3O+ directly affects the pH reading. This reaction …show more content…
It was hypothesised that the chlorine levels in the solution should alter depending on the amount of cyanuric acid added. When the samples are exposed to UV light the samples without cyanuric acid should see a more significant drop in chlorine levels than the samples with more cyanuric acid. The pH level should see a rise become more alkaline while the chlorine levels drop. The hypothesis was supported by the data that was collected from the experiments conducted on the pool water. Table 1 results show that the sample with pool water containing 0 amounts of cyanuric acid had a rapid decline of chlorine levels. Over the 2 hours the sample went from having a chlorine concentration of 2.5ppm to 0.25ppm. The OCl- concentration quickly drops to 0.25ppm in the 2 hours. Looking at the graph 1 we can see that the sample containing 0 ppm decay rate began slowing down. This indicates that it follows similarly to that of an exponential decay model. Between the other samples which contained cyanuric acid there is minute changes of the level of chlorine over the 2 hour exposure to sunlight. This holds true especially to that of the 60ppm and 100ppm cyanuric solutions. The concentration of OCl- in these solutions were relatively the same indicating that an almost double in concentration of cyanuric acid has very little effect on the loss of chlorine. This is why the recommended concentration to add into a pool is between 30ppm and 50ppm. This goes against the saying of having more is better. As we can clearly see in the graphs and tables there is very little differences between all of the cyanuric solutions. If you were to have a concentration of 100ppm in your pool you may start to see cloudiness in your pool and would just hinder the sterilisation effect of the
A reversible chemical reaction is a reaction which can proceed in both the forward and backward directions which can be represented by the symbol . A reaction comes to equilibrium when the rate of reaction of the reactants is equal to that of the rate of reaction of the products. An example of a reversible chemical reaction is one which occurs in the pool between chlorine and water (Deb Smith, 2006). Equation 1
A reaction takes place with water to produce hypochlorous acid, HOCL and chloride ions Cl-.
The hypochlorous acid slowly begins to separate into hydrogen and hypochlorite ions (OCL-). This can be modelled into an equation (Deb Smith, 2006). Equation 2
The presence of H3O+ directly affects the pH reading. This reaction …show more content…
It was hypothesised that the chlorine levels in the solution should alter depending on the amount of cyanuric acid added. When the samples are exposed to UV light the samples without cyanuric acid should see a more significant drop in chlorine levels than the samples with more cyanuric acid. The pH level should see a rise become more alkaline while the chlorine levels drop. The hypothesis was supported by the data that was collected from the experiments conducted on the pool water. Table 1 results show that the sample with pool water containing 0 amounts of cyanuric acid had a rapid decline of chlorine levels. Over the 2 hours the sample went from having a chlorine concentration of 2.5ppm to 0.25ppm. The OCl- concentration quickly drops to 0.25ppm in the 2 hours. Looking at the graph 1 we can see that the sample containing 0 ppm decay rate began slowing down. This indicates that it follows similarly to that of an exponential decay model. Between the other samples which contained cyanuric acid there is minute changes of the level of chlorine over the 2 hour exposure to sunlight. This holds true especially to that of the 60ppm and 100ppm cyanuric solutions. The concentration of OCl- in these solutions were relatively the same indicating that an almost double in concentration of cyanuric acid has very little effect on the loss of chlorine. This is why the recommended concentration to add into a pool is between 30ppm and 50ppm. This goes against the saying of having more is better. As we can clearly see in the graphs and tables there is very little differences between all of the cyanuric solutions. If you were to have a concentration of 100ppm in your pool you may start to see cloudiness in your pool and would just hinder the sterilisation effect of the