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5 September, 21:39

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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  1. 6 September, 00:00
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    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
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