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Prussian blue is -...

Prussian blue is -

A

`Na_(4)Fe(CN)_(6)`

B

`Na_(3)Fe(CN)_(6)`

C

`Fe_(4)[Fe(CN)_(6)]_(3)`

D

None of these

Text Solution

AI Generated Solution

The correct Answer is:
To determine what Prussian blue is, we need to analyze the options given and understand the chemistry behind Prussian blue formation. ### Step-by-Step Solution: 1. **Understanding Prussian Blue**: Prussian blue is a complex compound formed from iron and cyanide ions. It is known for its deep blue color. 2. **Identifying the Chemical Formula**: The chemical formula for Prussian blue can be represented as \( Fe_4[Fe(CN)_6]_3 \). This indicates that it consists of iron ions and cyanide ions. 3. **Analyzing the Options**: - **Option 1**: \( Na_4[Fe(CN)_6] \) - This is not Prussian blue; it is a different complex known as sodium ferrocyanide. - **Option 2**: \( Na_3[Fe(CN)_6] \) - This is also not Prussian blue; it is sodium ferricyanide. - **Option 3**: \( Fe_4[Fe(CN)_6]_3 \) - This matches the known formula for Prussian blue. - **Option 4**: \( Na_2SO_4 \) - This is sodium sulfate and not related to Prussian blue. 4. **Conclusion**: The correct answer is **Option 3: \( Fe_4[Fe(CN)_6]_3 \)**, which is the formula for Prussian blue.
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Although the chemical formulae of Prussian blue and Turnbull's blue are different yet these are supposed to be identical. How is it justified?

Calculate the mass percent compositon of each of the substance: Prussian blue, an ink pigment , Fe _(4) [Fe(CN) _(6) ]_(3)

Knowledge Check

  • Prussian's blue is formed when Fe^(+2) ions are added to K_(4)[Fe(CN)_(6)]_(2) Turnbull's blue is

    A
    `Fe_(4)[Fe(CN)_(6)]_(3)`
    B
    `Fe_(3)[Fe(CN)_(6)]_(2)`
    C
    `Fe_(2)[Fe(CN)_(6)]`
    D
    All

  • Recent X-ray work, IR and other spectroscopic methods have proved that Turnbull's blue is identical to Prussian blue. Q. What is the common formula of Turnbull's blue and Prussian blue?

    A
    `Fe_(3)[Fe(CN)_(6)]_(2)`
    B
    `Fe_(4)[Fe(CN)_(6)]_(3)`
    C
    `KF e[Fe(CN)_(6)]`
    D
    `KF e_(2)[Fe(CN)_(6)]`

  • Recent X-ray work, IR and other spectroscopic methods have proved that Turnbull's blue is identical to Prussian blue. Q. What is the common formula of Turnbull's blue and Prussian blue?

    A
    `Fe_(3)[Fe(CN)_(6)]_(2)`
    B
    `Fe_(4)[Fe(CN)_(6)]_(3)`
    C
    `KF e[Fe(CN)_(6)]`
    D
    `KF e_(2)[Fe(CN)_(6)]`

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