The following reactions (note that the arrows are pointing
only one direction) can be used to prepare an activity series
for the halogens:
Br21aq2 + 2 NaI1aq2¡2 NaBr1aq2 + I21aq2
Cl21aq2 + 2 NaBr1aq2¡2 NaCl1aq2 + Br21aq2
(a) Which elemental halogen would you predict is the most
stable, upon mixing with other halides?
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