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Question: please answer 1 explain the difference in ph due to...

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1. Explain the difference in pH due to the presence of Fe2+ species without doing a pH calculation

2. How does the distribution of Fe2+ species (aq, uncomplexed) compare with the FeC6H5COO2 in a pond containing sediment. use the soil-water partition coefficient to explain your answer. Kd=Cs/Cw where Cs is the concentration in the sediment and Cw is the concentration in the water phase
3. Alkalinity is related to the buffering capacity of an aqueous solution containing an acid and its conjugate base which can be understood using the Henderson-Hasselbalch equation, as follows. pH pKa +log [base/[acid] where Ka is the acid dissociation constant Calculate the pH of a buffer solution that is 0.050 M in benzoic acid (CsHsCOOH) and 0.150 M in sodium benzoate (CsHsCOONa). Note: Ka (benzoic acid) -6.5 x105. Outline any assumptions or simplifications in your calculation. What will happen to the final pH of the benzoic acid/benzoate solution if Fe2 (aq) is added and complex formation occurs according to reaction [31? The value of the formation constant is as follows: Kr (Fe(CsHsCO0)2) 1.5x1010 Fe? (aq) CgH,COO (aq) Fe2 (C,H,COO)2 (aq) 13] Explain the difference in pH due to the presence of Fe species without doing a pH calculation How does the distribution of Fe2 species (aq, uncomplexed) compare with the (Fe(CeHsCOO)2) (aq) in a pond containing sediment. Use the soil-water partition coefficient to explain your answer. Kwhere Cs is the concentration in the sediment and Cw is the concentration in the water phase.
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