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Sagot :
pH is the concentration of the hydrogen ion in the solution. The value of Ka for hydrogen fluoride is 2.7688.
What is pH?
pH is the potential of the hydrogen or the hydronium ion in the solution that depicts the acidic or the basic character of the solution.
Given,
pH = 2.3
Concentration of hydrogen fluoride = 0.25 M
The concentration of hydrogen ion is calculated as:
[tex]\begin{aligned} \rm pH & = \rm - log [H^{+}]\\\\2.3 &= \rm - log [H^{+}]\\\\&= 0.832\;\rm M\end{aligned}[/tex]
Ka is calculated as:
[tex]\begin{aligned} \rm Ka &= \rm \dfrac{[H^{+}]F^{-}]}{[HF]}\\\\&= \dfrac{0.832 \times 0.832}{0.25}\\\\&= 2.7688\end{aligned}[/tex]
Therefore, 2.7688 is the Ka for hydrogen fluoride.
Learn more about Ka here:
https://brainly.com/question/9938114
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