Arrange the following in increasing order of pH.

KNO_{3}(aq), CH_{3}COONa(aq), NH_{4}Cl(aq), C_{6}H_{5}COONH_{4}(aq)

Answers (1)

NH4?Cl<C6?H5?COONH4?<KNO3?<CH3?COONa

Salts of strong acid and strong base do not hydrolyse and form a neutral solution, thus, pH will be nearly 7 of KNO3. In sodium acetate, acetic acid remains unionised. This results in an increase in OH- concentration and pH will be more than 7. NH4Cl formed from a weak base, NH4OH and strong acid, HCl, in water dissociate completely, aq. ammonium ions undergo hydrolysis with water to form NH4OH and H+ ions resulting in less pH value.

 

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