CH10_Page_32 - [mot[GH‘ 1[Halo end[010 you will need four...

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Unformatted text preview: [mot], [GH‘ 1, [Halo], end [010- ], you will need four eqneden. As seen in the text, the pertinent equations are K : [HJUutCeHSO'] ° [€514,014] K“r =[H3O+][UH'] [Hm =[0H~1+ [CeHSO'J [CeHsOHJnn-n = [CanUH] + [C‘sHsD—1 Using either method should produce the same result. The values obtained for 2.50 x 10*1 mole L" are [H301 = 2.1 x 10‘? mo] rL'l,pH = 15.63 (enmpere to 0.74 ohtained in {n3} [efiHsor]=1.5n10‘T met-L“ [eat-1.01s] ; 2.5 x 10“ m0] - L"' [OH'] = 4.3 x 10'3 mol - L"I Similarly, for [cfiHsomm = 2.50 x 10" : [H30-+ I = 1.0 x 10‘T mnl - Lipid = 100 (eempnre to we obtained in {3}] [caHjo'] = 3.2 n10" mol - L" [CEHSCIH] E 2.5 x 10" mo] - L'] [DH'] = 9.8 X It)"3 tool . L" Note that for the more concentrated solution, the efiect of the sutoprotolysis of water is "veryr small. Notice also that the less concentrated solution is more acidic, due to the autoprotciysis of Water, than would be predicted if this effect were not operating. 10.108 (a) In the absence of a significant effect due to the autopmtolysis of water, the pH values ofthe 1.89 x iii—5 M and 9.64 x lfl'r" M HCIO soiutions can be calculated as described earlier. For 1-89:4 It)"5 [1101-11—1 : Concentration (me1.L-1}Hc1o(nq) + H200) =H30+[aq] + Clo-(ed) 326 ...
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