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Which aqueous solution shown below would have the greatest buffering capacity for resisting a change in pH when the strong acid HCl is added? a) Distilled H2O b) 0.25 M HC2H3O2 / 0.25 M NaC2H3O2 c) 0.75 M HC2H3O2 / 0.25 M NaC2H3O2 d) 0.25 M HC2H3O2 / 0.75 M NaC2H3O2 e) 0.75 M HC2H3O2