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n unknown weak acid, HA, it titrated with 0.6 M NaOH. The pH at the halfway point of this titration was found to be 4.215. If the initial pH of the weak acid solution (before titration) has a pH of 2.148, what was the concentration of the weak acid solution

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jamesesther1234

Answer:

The concentration of the weak acid was the antilog of the initial pH =  7.112 × [tex]10^{-3}[/tex] M

Explanation:

We are given the initial pH of the weak acid HA to be = 2.148.

Since pH = - log [HA]

⇒ [HA] = [tex]10^{-pH} = 10^{-2.148}[/tex]

[HA] = 7.112 × [tex]10^{-3}[/tex] M ≡ 0.0007112 M