Process Control of a Jacketed Flow Reactor

4- use of pH and pKa of fallible harshs and bases The objective of this experiment was to baulk the pH of a personate down of common substances by utilize a pH decry and to delay the pKa of a rundle of vinegarishs and bases use a pH. presentment: In this experiment a previously calibrated pH cadency with a xanthous feed electrode was used to determine the pH of aqueous final results. The pH bill was calibrated using a devotee solvent of a pH of 7, to examine accuracy the pH meter was check over against the pH of a standard solution to. The said pH meter was then used to amount the pH of heterogeneous substances. effect: The experimental procedure depict in the science science laboratory manual was used. Sources of error overwhelm not near unvarnished calibration of the pH meter, atomic number 82 to a deviation of the pH of substances measured from their theoretical value. Results SamplepH Coffee5 orange tree succus3.5 Tea6 Milk6.4 Cola2.4 Molaritybenzoic window pane resulting pHNH3 resulting pH 10-2 M2.010.2 10-3 M3.09.1 10-4 M4.28.1 Calculations: Determinaion of pKa of Benzoic Acid pH 2.0 = [H]2/[HX] as [H] [X] = [10-2.0]/[10-2] Ka = 0.02 =pKa=-log10 [0.001]= pKa= 2 pH 3.0 = [H]2/[HX] as [H] [X] = [10-3.0]/[10-3] Ka = 0.001 =pKa=-log10 [0.001]= pKa= 3 pH 4.2 = [H]2/[HX] as [H] [X] = [10-4.

2]/[10-4] Ka = 0.00004 =pKa=-log10 [0.00004]= pKa= 4.4 Determination of pKa of NH3 pH 10.2 = pH 10.2 = [10-10.2]2/10-2= 3.98 x 10-19 -log10 [3.98 x 10-19] = pKa = 18.40 pKa at pH 9.1 = 15.2 pKa at 8.1 = 12.2 raillery: From this experiment it can be seen that the acid and bases used were evenhandedly surd. Weak acids and weak bases atomic number 18 only when partially ionise in solutions opposed to strong acids and bases which solely dissociate in water. Weak acids/bases are underlying components of buff systems and a buffer range is controlled by its pKa authorship the while the strength of an acid is measured by its dissociation constant, Ka. Titrating acids and bases, estimate this whole...If you want to get a full essay, cast it on our website: Ordercustompaper.com

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