(a). (i) NH4Cl + H2O == NH4 OH + HCl Since in water it produces strong acid HCl which willdissociates completely to produce H+ ions.So, it is acidic innature (ii) ZnSO4 + 2H2O == Zn(OH)2 + H2 SO4 Since in water it produces strong acid H2SO4 which willdissociates completely to produce H+ ions.So, it is acidic innature (iii)Na2CO3 + 2H2O == 2NaOH + H2CO3 Since in water it produces strong base NaOH which willdissociates completely to produce OH- ions.So, it is basic innature (b). Concentration C = 0.10 M pH = 11.5 Solution (a). (i) NH4Cl + H2O == NH4 OH + HCl Since in water it produces strong acid HCl which willdissociates completely to produce H+ ions.So, it is acidic innature (ii) ZnSO4 + 2H2O == Zn(OH)2 + H2 SO4 Since in water it produces strong acid H2SO4 which willdissociates completely to produce H+ ions.So, it is acidic innature (iii)Na2CO3 + 2H2O == 2NaOH + H2CO3 Since in water it produces strong base NaOH which willdissociates completely to produce OH- ions.So, it is basic innature (b). Concentration C = 0.10 M pH = 11.5.