Describe how the weak monoprotic acid hydrofluoric acid, HF (used in aluminum processing) acts when it is added to water, including a description of the nature of the particles in solution before and after the reaction with water. If there is a reversible reaction with water, describe the forward and the reverse reactions

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Answer:

Explanation:

HF ,Hydrofluoric acid  happens to be a weak acid and as we know that a weak acid is partially dissociated in water.

So when we dissolve HF in water it would subsequently dissociate into H⁺ and F⁻ions . The solution now would contain hydronium ion that is H+ ion.

The solution would also contain dissociated F⁻ ion and solvent H20 molecules.

The following reaction would take place:

HF+H₂O⇆H₃O⁺+F⁻

so the reaction in forward direction is the dissociation of HF into H₃O⁺(that is H⁺) and F⁻ion.

The backward reaction would be the recombination of H₃O⁺(that is H⁺) and F⁻ion to give back HF and H₂O

Monoprotic weak acid can donate only a single hydrogen atom. The forward reaction will be of the dissociation of HF and backwards of the recombination of hydronium ion.

What is a weak acid?

Monoprotic weak acids are acid solutions that cannot completely dissociate the constituent ions of themselves in the aqueous solution. Hydrofluoric acid (HF) is a weak acid and cannot completely dissociate in the aqueous solution.

The reaction of the HF in water can be shown as:

[tex]\rm HF+H_{2}O\rightleftharpoons H_{3}O^{+}+F^{-}[/tex]

The reaction in the forward direction will result in the dissociation of Hydrofluoric acid (HF) into hydronium ion and fluoride ion.

The reaction in the backward direction will result in the recombination of hydronium ion and fluoride ion back to water and hydrofluoric acid.

Therefore, the reverse and the backwards reaction can be shown as HF is a weak acid.

Learn more about weak acid here:

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