FeCl3(s) is often added as a flocculant to water in treatment plants. For the problems below, assume that ferrihydrite, Fe(OH)3(s), is the only solid that forms.

FeCl3(s) is often added as a flocculant to water in treatment plants. For the problems below, assume that ferrihydrite, Fe(OH)3(s),
is the only solid that forms.

(b) Determine the pH and dissolved iron concentration if 10−4 M FeCl3 were
added to pure water.
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