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Is the solubility of FeFe (OH)(OH) 33 increased, decreased, or unchanged on addition of each of the following substances? Write a balanced net ionic equation for each dissolution reaction.
(a) HBr(aq).
(b) NaOH(aq).
(c) KCN(aq).

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Answer:

a) solubility increases

b) solubility decreases

c) solubility increases

Explanation:

I) Fe^3+(aq) + 3Br^- --------> FeBr3 (aq) solubility increases

II) Fe^3+(aq) + 3OH^- ---------> Fe(OH)3(s) solubility decreases

III) Fe^3+(aq) + 6CN^- -----------> [Fe(CN)6]^3- (aq) solubility increases

The ionic equations shown above shows the possible changes in solubility when Fe(OH)3 is added to each of the solutions mentioned in the question.

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