Question
If a solution of hydrofluoric acid $\left(\mathrm{HF} ; K_{a}=6.8 \times 10^{-4}\right)$ has a $\mathrm{pH}$ of 2.12 , calculate the concentration of hydrofluoric acid.
Step 1
Given that the pH of the solution is 2.12, we can calculate the concentration of $H^{+}$ ions as follows: \[ [H^{+}]=10^{-\mathrm{pH}}=10^{-2.12}=7.6 \times 10^{-3} \, \mathrm{M} \] Show more…
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If a solution of $\mathrm{HF}\left(K_{a}=6.8 \times 10^{-4}\right)$ has a pH of $3.65,$ calculate the concentration of hydrofluoric acid.
If a solution of HF (Ka = 6.8 x 10-4) has a pH of 3.65, calculatethe concentration of hydrofluoric acid.
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