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

pH value depends on the nature of the ions in the solution:${\text{BaCl}}_2$ is a salt of a strong base (${\text{Ba(OH)}}_2$) and a strong acid ($\text{HCl}$). It does not undergo hydrolysis, and the solution is neutral ($\text{pH}\approx 7$).$\text{LiCl}$ is also a salt of a strong acid and strong base, but ${\text{Li}}^{+}$ has a higher charge density than ${\text{Ba}}^{2+}$ and shows very slight acidic character compared to Ba.${\text{BeCl}}_2$ and ${\text{AlCl}}_3$ are salts of weak bases and strong acids. They undergo cationic hydrolysis to produce ${\text{H}}^{+}$ ions, making the solution acidic ($\text{pH}<7$).Among the choices, the salt derived from the strongest base (${\text{Ba(OH)}}_2$) will have the highest pH (closest to neutral or slightly basic depending on concentration).