Question

Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest $pH$ value?

• A. $BaC{l}_2$
• B. $AlC{l}_3$
• C. $LiCl$
• D. $BeC{l}_2$

Answer 1

Answer: (A)

Hint- Study about the strength of acids and bases.
Concept-
Acids and bases can be differentiated based on their strength as weak
and strong.
Correct option-
Option $C$ is correct.
Explanation-
$BaC{l}_2$ is made up of strong base $Ba(OH{)}_2$ and strong acid $HCl$.
$AlC{l}_3$ is made up of weak base $Al(OH{)}_3$ and strong acid $HCl$.
$LiCl$ is made up of weak base $LiOH$ and strong acid $HCl$.
$BeC{l}_2$ is made up of weak base $Be(OH{)}_2$ and strong acid $HCl$.
$Ba(OH{)}_2$ is strongest base among the given options thus have maximum pH.