Q. The pH values of 0.1 M solution of $HCl,\ CH_{3}COOH,\ NH_{4}Cl\ and\ CH_{3}COONa$ will have the order
A) $HCl < CH_{3}COOH < NH_{4}Cl < CH_{3}COONa$
B) ${CH}_{3}COONa < {NH}_{4}Cl < {CH}_{3}COOH < HCl$
C) ${NH}_{4}Cl < {CH}_{3}COONa < {CH}_{3}COOH < HCl$
D) All will have same of pH value
Explanation
(a)
Strong acids have low pH value while strong bases have high pH value. Hence, the order of pH is
$HCl\ \ \ \ \ \ \ \ < \ \ \ \ CH_{3}COOH\ \ < \ NH_{4}Cl\ \ \ \ \ \ \ \ \ \ \ \ < \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}COONa$
strong weak (salt of weak base (salt of weak acid
Acid acid and strong acid) and strong base)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.