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5. Calculate the pH of the following solutions. (4 pts) 0S18 500257 a) 0.25 M NHCI solution b) 0.10 M NaHCO3 solution 6. b) A
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NH4 Caq) +Hao ( NHs Ca) + Hs0t (a) Ka Kw Kb l0-14 1.8 x 10-5 Let the Concentration Hydzonium be oc Ka- CH30+ CNH NHqt 5.56x12101 Lot]A Dissociation is low 2-22x108 11 LotH ts eaual to 4.7 x10-S HPM POH = - lcq LOH 4.32 So, PH14-4,32 9.68 pH- 9.68 90

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