The Equilibrium Constants (K_a)for HCN and HF in H₂O at 25°C

question 22

Multiple Choice

The equilibrium constants (K_a) for HCN and HF in H₂O at 25°C are 6.2 $\times$ 10^-10 and 7.2 $\times$ 10^-4,respectively.The relative order of base strengths is:

• A)F^- > H₂O > CN^-
• B)H₂O > F^- > CN^-
• C)CN^- > F^- > H₂O
• D)F^- > CN^- > H₂O
• E)none of these

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