✔ 最佳答案
Firstly, you have to know what is pH
There's an equation:
pH = -log[H^+]
That is, pH is equal to the -log of the concentration of hydronium ion (or H+ ions)
Diluting an acid will decrease the concentration of H+ ions in the solution. As the concentration of H+ decreases upon dilution, the value of -log[H+] increases.
So, diluting an acid will increase its pH value but not 下降 (*** remember the lower the pH value , the more acidic the solution it is)
For the question, one of the two acid is a weak acid. Weak acid dissociates less rapidly than a strong acid (eg HCl) . FOr a strong acid, it completely ionizes in water while a weak acid only partially ionizes in water.
When diluting the two acid separately(with same amount of water), the weak acid dissociates less. Therefore, there will be less H+ ions in the diluted weak acid solution.
According to pH = -log[H+] , the pH value will be higher comparing to the diluted strong acid.
However, the two diluted acid must have a pH value greater than 2. THis is simply because the concentration of H+ ions of the diluted acid decreased after the dilution
