Complete and balance the following equations. If no reaction...

Complete and balance the following equations. If no reaction occurs, write NR. (a) $\mathrm{Cl}_{2}(g)+\mathrm{I}^{-}(a q) \longrightarrow$ (b) $\mathrm{F}_{2}(g)+\mathrm{Br}^{-}(a q) \longrightarrow$ (c) $\mathrm{I}_{2}(s)+\mathrm{Cl}^{-}(a q) \longrightarrow$ (d) $\mathrm{Br}_{2}(l)+\mathrm{I}^{-}(a q) \longrightarrow$

Complete and balance the following equations. If no reaction occurs, write NR.
(a) $\mathrm{Cl}_{2}(g)+\mathrm{I}^{-}(a q) \longrightarrow$
(b) $\mathrm{F}_{2}(g)+\mathrm{Br}^{-}(a q) \longrightarrow$
(c) $\mathrm{I}_{2}(s)+\mathrm{Cl}^{-}(a q) \longrightarrow$
(d) $\mathrm{Br}_{2}(l)+\mathrm{I}^{-}(a q) \longrightarrow$

Key Concepts

Redox Reactions

Halogen displacement reactions are redox (oxidation-reduction) reactions where electron transfer occurs between the reactants. One species is oxidized (loses electrons) while the other is reduced (gains electrons). Understanding the electron transfer mechanism is essential to predict the products and balance the equations accurately.

Halogen Displacement Reactions

Halogen displacement reactions involve one halogen displacing another from a compound via a redox process because of differences in reactivity among the halogens. In these reactions, a more reactive halogen will oxidize the less reactive halide ion, leading to the formation of a new halide compound and the reduction of the halogen element.

Activity Series

The activity series is a ranking of elements—particularly metals and halogens—based on their chemical reactivity. For halogens, the series indicates which halogen can displace another from its compounds. This concept helps predict whether a halogen displacement reaction will occur by comparing the relative reactivities of the elements involved.

Balancing Chemical Equations

Balancing chemical equations is the process of ensuring that both mass and charge are conserved during a chemical reaction. This involves adjusting the coefficients of the reactants and products so that the number of atoms for each element, as well as the total charge, is the same on both sides of the equation.

No Reaction Conditions

In some cases, if the relative reactivity of the halogens does not allow for the displacement of one halogen by another, no reaction occurs. This is often indicated by the term 'NR' (No Reaction) when the attempted substitution is thermodynamically or kinetically unfavorable.

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