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Water Chem - project3_w_notes

Water Chem - project3_w_notes - Findthecarbonicacid(H2CO3)...

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Findthecarbonicacid(H 2 CO 3 )concentrationinwatersthat haveequilibratedwiththeatmosphereat20 o C.Henry’slaw constantfordissolutionofCO at20 Cis0.0331,andtheCO concentrationintheatmosphereis370ppm. 22 HO HCO gl a q
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WhatarethepHand TOT CO 3 inasolutionofpurewaterthat equilibrateswithatmosphericCO 2 at20 o C? Becauseweknowalltheinputstothesolution ,wecanwrite andsolveachargebalance.
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2 33 HO HH C O O0     12 3 1 22 HCO H2 0 H aa a w KK K 
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Asolutioncontains10 3 MTOT CO .UnderwhatconditionswillCO 2 ( g )move fromtheatmospheretosolution,andunderwhatconditionswillitmovein theoppositedirection?  o 5 equilibrium 23 w/atm @20 C mol H CO 1.23x10 L pH HCO H 7.8 7.29E 06 9.70E 04 2.26E 05 7.9 9.19E 9.73E 1.80E 8.0 1.16E 9.74E 1.43E 8.1 1.46E 1.13E 8.2 1.83E 8.98E 8.3 2.29E 7.11E 1 11 aa a KK K TOT       0.0000 0.0002 0.0004 0.0006 0.0008 0.0010 3579 Conc'n as given species (mol/L) 31  HH K K 
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ThesolutionintheprecedingexampleisadjustedtoandheldatpH8.5.How
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Water Chem - project3_w_notes - Findthecarbonicacid(H2CO3)...

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