Which one of the following salts,when dissolved in water,produces the solution with the lowest pH?

Question

Quizplus · Accepted Answer

AlCl3 is an acidic salt as it hydrolyzes in aqueous solution to produce H3O+ ions. The hydrolysis reaction is:
AlCl3 + 3H2O -> Al(OH)3 + 3HCl
The Al(OH)3 produced in the reaction is a weak acid that can donate hydrogen ions to water to form H3O+. Thus, the presence of H3O+ ions in the solution makes it acidic, giving it the lowest pH among the given options. The other salts do not have a significant effect on the pH of the solution as they do not hydrolyze in water to any appreciable extent.

Which One of the Following Salts,when Dissolved in Water,produces the Solution