Which solution, solution X of pH 9.4 or solution Y of pH 7.5, is more acidic? Which solution, solution of 9.4 or solution of 7.5, is more acidic? Solution X is more acidic. Solution Y is more acidic.

Solution Y is more acidic

Explanation:

The pH value is an indicator of the concentration of hydrogen ions (H⁺) in an aqueous solution, and it is defined as:

pH= -log [H⁺]

⇒

Where  [H⁺] is the concentration of H⁺. A solution with a higher concentration of H⁺ is more acidic, and a solution with a lower concentration of H⁺ is less acidic or basic.

As result, the lower the pH, the more the concentration of hydrogen ions ([H⁺]), and the aqueous solution is more acidic.

Solution Y has a lower pH value (7.5) than solution X (9.4). So, solution Y is more acidic.

i'm assuming that the correct answer is indeed the first one/ "a"..

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.