Question

Fe－FeSO4－Fe(OH)2－Fe(OH)3－FeCl3－KFe[Fe(CN)6]

Answer 1

Fe+H2SO4=FeSO4+H2

FeSO4+2KOH=Fe(OH)2+K2SO4

4Fe(OH)2+O2+2H2O=4Fe(OH)3

Fe(OH)3+3HCl=FeCl3+3H2O

FeCl3+K4[Fe(CN)6]=KFe[Fe(CN)6]+3KCl

Answer 2

The sequence you provided represents a series of chemical reactions involving iron (Fe) and various compounds. Let's break down each part:

1. Fe: This represents elemental iron, which is the pure form of iron.

2. FeSO4: This is ferrous sulfate, a compound composed of iron (Fe) and sulfate ions (SO4^2-). It is often used as a supplement and in various industrial applications.

3. Fe(OH)2: This is ferrous hydroxide, a compound composed of iron (Fe) and hydroxide ions (OH^-). It is a base and can act as a precursor to other iron compounds.

4. Fe(OH)3: This is ferric hydroxide, a compound composed of iron (Fe) and hydroxide ions (OH^-). It is often encountered as a reddish-brown solid and can be used in water treatment processes.

5. FeCl3: This is ferric chloride, a compound composed of iron (Fe) and chloride ions (Cl^-). It is a strong Lewis acid and is used in various chemical applications.

6. KFe[Fe(CN)6]: This is potassium hexacyanoferrate(III), a coordination compound containing potassium ions (K+) and the hexacyanoferrate(III) ion [Fe(CN)6]^3-. It is also known as potassium ferricyanide and has various uses in redox reactions and analytical chemistry.

These compounds represent a series of chemical reactions and transformations of iron species, ranging from elemental iron to various iron compounds with different oxidation states. The reactions involving these compounds might be used in various industrial processes, laboratory experiments, or even in nature as part of the iron cycle.