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Jae number # Visual changes Ph number # Spectrometer Jar #1 For 30 rpm, nothing happen. Nothing for 20rpm Ph= 8.01 20 Jar #2 Cloudy Ph= 7.91 36 Jar #3 For 30 rpm its cloudy. For 20 rpm, cloudy with...

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Jae number # Visual changes Ph number # Spectrometer
Jar #1 For 30 rpm, nothing happen. Nothing for 20rpm Ph= 8.01 20
Jar #2 Cloudy Ph= 7.91 36
Jar #3 For 30 rpm its cloudy. For 20 rpm, cloudy with white things Ph= 7.68 13
Jar#4 cloudy Ph= 7.31 26
Jar #5 cloudy Ph= 7.09 27
Jar #6 30 rpm , cloudy. 20 rpm more cloudy Ph=6.59 39
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To:   Andrew Whelton, Ph.D., Brian Merkersen; Dept. Civil Engineering, Univ. of South Alabama  From:   John Snow, Jiminy Cricket, Unji Punji; CE 374 students  Date:   February 19, 2013  Subject:   Results of Water pH and Alkalinity Characterization of Unknown Water Sample    Greetings Dr. Whelton:    Below we have provided a summary of the laboratory experiment conducted on February 9, 2013.  Please feel free to contact us if you have any questions.    Regards,  John, Jiminy, and Unji    Summary of Water pH and Alkalinity Characterization of the Unknown Water Sample    Introduction. The purpose of this experiment was to learn and apply wet chemistry techniques and  quantify the alkalinity concentration of a water sample of unknown origin. This water sample was  provided by the Instructor. Water quality characterization was conducted on February 9, 2013 from 2:00  PM – 3:14 PM in the Shelby Hall Environmental Engineering Laboratory.  The alkalinity concentration of a water (commonly reported as mg/L as CaCO ) represents the  3 buffering  capacity  of  that  water.  More  specifically,  alkalinity  enables  waters  to  resist  water  pH  reductions  when  acid  is  added  or  formed  in-situ.  Phenolphthalein  alkalinity  can  be  quantified ...

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Answered Same Day Dec 23, 2021

Solution

David answered on Dec 23 2021
120 Votes
Introduction and Theory: Coagulation is process where small particles of color, tu
idity and bacteria are turned into larger flocs in form of precipitates or suspended particles. After this, the flocs are conditioned in such a way that they can be readily removed. During this process a positive ion is added to water to decrease surface charge to the point where colloids are not repelled from each other. Aluminium (Al3+),widely used coagulant, is used in coagulation process for its good coagulant nature, such as- it can efficiently neutralize negative charges in neutral water, it produces safe water to environment, it is insoluble in neutral pH. After adding alum to water containing alkalinity, following equation occurs
For each mole of alum, six moles of alkalinity is used to produce six moles of ca
on-di-oxide. Above mentioned reaction shifts the ca
onate equili
ium and reduce the pH.
Objective:...
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