We are asked to predict whether a reaction will occur when elemental bromine and lithium chloride are mixed.
Since Cl2 displaces Br- from NaBr, Cl2 is more reactive than Br2.
Hence the order of reactivity is: Cl2 > Br2 > I2
The following reactions (note that the arrows are pointing
only one direction) can be used to prepare an activity series
for the halogens:
Br2(aq) + 2 NaI(aq) → 2 NaBr(aq) + I2(aq)
Cl2(aq) + 2 NaBr(aq) → 2 NaCl(aq) + Br2(aq)
Predict whether a reaction will occur when elemental bromine and lithium chloride are mixed.
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