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For instance, a strong acid and weak base reaction may proceed as such:
For instance, a strong acid and weak base reaction may proceed as such:
2HCl<sub>(aq)</sub> + Fe(OH)<sub>2(aq)</sub> -- 2H<sub>2</sub>O<sub>(l)</sub> + FeCl<sub>2(aq)</sub>
2HCl<sub>(aq)</sub> + Fe(OH)<sub>2(aq)</sub> -- 2H<sub>2</sub>O<sub>(l)</sub> + FeCl<sub>2(aq)</sub>
The iron component of the iron chloride may then undergo a hydrolysis reaction with water, such that:
The iron component of the iron chloride may then undergo a hydrolysis reaction with water, such that:
Fe<sup>2+</sup> + H<sub>2</sub>O<sub>(l)</sub> -- Fe(OH)<sub>2(aq)</sub> + H<sup>+</sup><sub>(aq)</sub>
Fe<sup>2+</sup> + H<sub>2</sub>O<sub>(l)</sub> -- Fe(OH)<sub>2(aq)</sub> + H<sup>+</sup><sub>(aq)</sub>
As the iron hydroxide is a weak base it will not dissociate to any great extent and hence will not raise the pH of the water greatly, however this hydrolysis reaction causes an excess of hydrogen ions, which result in the pH of the water being lowered hence causing it to be acidic. As the chloride ion is a weak base it will not react with water, hence producing an acidic salt.
As the iron hydroxide is a weak base it will not dissociate to any great extent and hence will not raise the pH of the water greatly, however this hydrolysis reaction causes an excess of hydrogen ions, which result in the pH of the water being lowered hence causing it to be acidic. As the chloride ion is a weak base it will not react with water, hence producing an acidic salt.