Hello!
We have the following data:
[H+] = 0.1 M → [tex] 1*10^{-1} [/tex]
Formula:
[tex] pH = - log\:[H^+] [/tex]
[tex] pH = - log\:[1*10^{-1}] [/tex]
[tex] pH = 1 - log\:1 [/tex]
[tex] pH = 1 - 0 [/tex]
[tex] \boxed{\boxed{pH = 1}}\end{array}}\qquad\checkmark [/tex]
Answer:
A. 1
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I Hope this helps, greetings ... DexteR!