Use the References to access important values if needed for this question. A 1.0

Question

Use the References to access important values if needed for this question. A 1.00 liter solution contains 0.39 moles hydrofluoric acid and 0.30 moles sodium fluoride. If 0.15 moles of hydroiodic acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of hydroiodic acid.) A. The number of moles of HF will remain the same. B. The number of moles of F^- will remain the same. C. The equilibrium concentration of H_3O^+ will decrease. D. The pH will remain the same. E. The ratio of [HF]/[F^-] will decrease.

Explanation / Answer

Answer:-

Using henderson Hasselbalch equation,

pH= pKa +log[F-]/[HF]

Hydrochloric acis is a strong acid and on adding will increase the H3O+ ion concentration and decrease the pH and F- in the solution.

so

A, False

B. False

C.False

D.False

E. False

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