Respuesta :

Explanation:

We are given: concentration of a weak acid = 10^-4 M

[tex]\begin{gathered} pH\text{ = -log\lbrack H}^+] \\ \\ \text{ = -log\lbrack10}^{-4}] \\ \\ \text{ = 4} \end{gathered}[/tex]

Answer:

The pH of a weak acid is 4.

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