Answer:
C. [tex]100[/tex]
Explanation:
pH = [tex]\displaystyle -log[H_3O^+][/tex]
[tex]\displaystyle [H_3O^+] = 10^{-pH}[/tex]
If pH = 2, then [tex]\displaystyle [H_3O^+] = \displaystyle 10^{-2}[/tex]
If pH = 4, then [tex]\displaystyle [H_3O^+] = 10^{-4}[/tex]
In consideration of [tex]\displaystyle 10^{-2} = [100]10^{-4},[/tex] the concentration of [tex]\displaystyle [H_3O^+][/tex]is 100 times as massive at pH = 2 than at pH = 4, so the acid is 100 times as puissant at pH = 2 than at pH = 4.
* The pH scale is logarithmic to base 10, so a change in one instrument in pH equals a change in the concentration by a factor of 10 [tex][H_3O^+].[/tex]
* Hydronium → [tex]\displaystyle [H_3O^+][/tex]
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