The end product in the colloidal iron method is Prussian blue.

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Multiple Choice

The end product in the colloidal iron method is Prussian blue.

Explanation:
The reaction behind the colloidal iron method produces Prussian blue, a blue pigment formed when ferric ions react with ferrocyanide to make ferric ferrocyanide (Prussian blue, Fe4[Fe(CN)6]3). In this stain, iron in the tissue is made visible by forming this insoluble blue compound, so a blue color indicates the presence of iron. Ferric oxide and silver are not produced in this reaction, which is why they aren’t the end product of this method.

The reaction behind the colloidal iron method produces Prussian blue, a blue pigment formed when ferric ions react with ferrocyanide to make ferric ferrocyanide (Prussian blue, Fe4[Fe(CN)6]3). In this stain, iron in the tissue is made visible by forming this insoluble blue compound, so a blue color indicates the presence of iron. Ferric oxide and silver are not produced in this reaction, which is why they aren’t the end product of this method.

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