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General Chemistry

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Redox Reaction: Digestion of Iron

CHEM-H7ITEV

There is iron metal in many popular brands of cereal to give people enough uptake of the element iron, which is an essential nutrient. The metal ion has to be transformed to ionic form to be absorbed.

How is it turned into ions in the form of a soluble salt in our digestion system?

A

$Fe(s)\space +\ 2HCl(aq)\space \longrightarrow \space Fe{ Cl }_{ 2 }(aq)\space +\space { H }_{ 2 }(g)$

B

$2Fe(s)\space +\space 6HCl(aq)\space \longrightarrow \space 2Fe{ Cl }_{ 3 }(aq)\space +\space 3{ H }_{ 2 }(g)$

C

$2Fe(s)\space +\space { O }_{ 2 }(g)\space \longrightarrow \space 2FeO(s)$

D

$4Fe(s)\space +\space 3 { O }_{ 2 }(g)\space \longrightarrow \space 2{ Fe }_{ 2 }{ O }_{ 3 }(s)$