Iron(II) can be oxidized by an acidic K2 Cr2 O7 solution according to the net ionic equation:

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Iron(II) can be oxidized by an acidic K2 Cr2 O7 solution...

Iron(II) can be oxidized by an acidic $\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$ solution according to the net ionic equation: $$ \begin{array}{r} \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+6 \mathrm{Fe}^{2+}+14 \mathrm{H}^{+} \longrightarrow \\ 2 \mathrm{Cr}^{3+}+6 \mathrm{Fe}^{3+}+7 \mathrm{H}_{2} \mathrm{O} \end{array} $$

Iron(II) can be oxidized by an acidic $\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$ solution according to the net ionic equation:
$$
\begin{array}{r}
\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+6 \mathrm{Fe}^{2+}+14 \mathrm{H}^{+} \longrightarrow \\
2 \mathrm{Cr}^{3+}+6 \mathrm{Fe}^{3+}+7 \mathrm{H}_{2} \mathrm{O}
\end{array}
$$

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Key Concepts

Balancing in Acidic Media

Balancing redox reactions in an acidic medium involves the use of H+ ions and water molecules to balance hydrogen and oxygen atoms, respectively. This technique ensures that the overall reaction remains balanced in both mass and charge when the reaction occurs in an acid-based environment.

Redox Reactions

Redox reactions involve the transfer of electrons between species, where one species undergoes oxidation (loss of electrons) and another undergoes reduction (gain of electrons). This process is fundamental to understanding many chemical transformations and energy changes in chemical systems.

Oxidation States

Oxidation states (or oxidation numbers) are used to keep track of electron transfer in chemical reactions. By assigning oxidation numbers to elements in compounds and ions, one can determine which species are oxidized and which are reduced during a redox process.

Half-Reaction Method

The half-reaction method is a systematic approach to balance redox reactions by dividing them into two separate equations: one for oxidation and one for reduction. Each half-reaction is balanced individually for mass and charge before they are recombined to ensure consistency in the overall reaction.

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