SwampProbSoln

# SwampProbSoln - 43 Problem l During a rainstorm a reduced...

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Unformatted text preview: 43% Problem l During a rainstorm a reduced swamp doubles its volume and reaches complete acid-base and redox equilibrium—it does NOT equilibrate with the atmosphere. :1 (Assume organic carbon formation and utilization to be negligible.) You may 3" neglect minor species only if they are 10% or less of the major species. Given the initial conditions (before the rainstorm): pH = 8.0 :fl Alk = 10'3 M [SOf'h = 4 x 10'3 M [HZSIT z 4 x 104 M (Carbonate system present but not at equilibrium with. the atmosphere) and assuming rainwater to be slightly polluted (Alk = —10“ M) and saturated with atmospheric CO2 and O2 ([H2C03*] = 10'5 M and [GM] 2 3 x 10“ M), What is the ﬁnal Alk, pH, and pe of the swamp? HINTS: Since this is a mixing problem, you need to deal with conservative quantities. For the redox portion of the problem the main reaction to consider is 2 the oxidation of sulfide species (H5 or HS‘) to sulfate (SO.1 ‘)With oxygen. To 'ful'lj Chili-«QM 'H/Ul QWVthm (éumtlso “n “M Mum?) we voted to m\mlo.u ”Um CT m Han swampe- mk-ri ~[H‘{l *EOHi’rCHCOjl 4” lCCOg’Liti’rSj 4’2 [313 l _ a \ {8mlities +2) all. ‘3 [Hang] + [Hsj @ pl”) <3 0 9%: {IVA <3>| wa‘lL QSﬁf‘miﬁt [E‘s-39 ST 5 H MGM M m ’7) “H _. - __.\.\ -- «(33,11 (Soteeogl ~ \(5 M, “HO M ~ 6M0 M ‘ IO - 1 -—s fusing? MW W53 (Rico; eloq‘q % [C051] (0 .81 L00 um Como Cale, CT ﬂa anﬂiﬁa? ‘ we con ”ELM 43H in laud M TD Wlﬁcchbfq lq’u/L. mk= {Hr} 'tCOH‘l +[Hco-{J *cho3'j 5 ”[0 [Hi3 ilcj-H ) 5C3 {HLCO§L;J: [0‘5 [‘5 dﬁmian‘t (1&me {Hearse} 1 {(5155 592% ' Cr?”- “3’5 M Min _ 3.5 9W} \(33 *(mikg, ILLS *IDHM ‘40 Mm. _ a ‘3 ‘9 “\$06. arm”: l9 1‘ Ho) : \o M 2. Mus. Q't‘LS} T 1 2 uqch‘ M KQQ, M003 ‘WWCk/‘b H23 3501 M Enwm’?a;i~(htq¢ ' not“ mad: unﬁk 46M UMKHao 4.9.9. ’( m w Cat/3.9. 0-2) wi“ UL MmOu-Qda ' Hugh. 3m ”52:15:th 9m suVQicXQ 07¢;de MW ‘HAL 3i pancivc‘ﬂ Cohm?owz.vxfo @ ICoLﬂQzauM Ph 50 M W 33 Mu“ chuQ «CW/1. max/894) ‘ :1 0-13 4' Hi8 : miv; \n'dial l 05y: “‘ M 2 jab-‘4. (ULW_ \H \O M UV.) ) ...
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