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The pH of a saturated calcium hydroxide solution (aka lime) decreases with an increase in pH. (Previous sentence doesn't make sense.) (see figure 1 below) The temperature at the Honduran plants is generally in the range of 19-21 degrees C but during summers it can go up to about increase to 27 degrees C. This temperature change can change the pH of lime and thereby affect the working of the lime feeder and needs to be taken into consideration while designing the lime feeder. (Explain how this is expected behavior of solute in water with respect to temperature. Why is pH of the saturated solution decreasing with increasing temperature?)
Table 2: Changes in pH of lime with respect to Temperature changes
(give descriptive names to the images files. Replaces this image with a graph.)
PROCEDURES AND RESULTS
One of the first tasks was to calculate the dosage of lime required by the lime feeder and the relationship between the changes in pH and ANC with changing flow rates in the lime feeder. The analysis of lime feeder requirements was made with the help of MathCAD software.
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