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

Q: Use the References to access important values if needed for this question. Given

1) Balanced net ionic eq that occurs is HF + ClO- HOCl + F - 2) equilibrium constant K = Ka of HF / Ka of HOCl = 7.2 x 10^-4 / ( 3.5 x 10^-8) = 20571 Hence at equilibrium products will be favoured 3) pH of resultanat solution will be basic , hence greater than seven ( since HF is stronger acid than HOCl , and F- is stronger base than OCl- , we see in products we have F- , hence we get overall basic )

ID: 493016 • Letter: U

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Given the following information:

(1) Write the net ionic equation for the reaction that occurs when equal volumes of 0.264 M aqueous hydrofluoric acid and sodium hypochlorite are mixed. It is not necessary to include states such as (aq) or (s).

(2) At equilibrium the _________reactantsproducts will be favored.

(3) The pH of the resulting solution will be _________greater thanequal toless than seven.

hydrofluoric acid HF Ka = 7.2×10-4 hypochlorous acid HClO Ka = 3.5×10-8

Explanation / Answer

1) Balanced net ionic eq that occurs is

HF + ClO- <----> HOCl + F -

2) equilibrium constant K = Ka of HF / Ka of HOCl = 7.2 x 10^-4 / ( 3.5 x 10^-8) = 20571

Hence at equilibrium products will be favoured

3) pH of resultanat solution will be basic , hence greater than seven ( since HF is stronger acid than HOCl , and F- is stronger base than OCl- , we see in products we have F- , hence we get overall basic )

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