yes..no
Bromine and Potassium iodide react to form Potassium bromide and Iodine.
No. However, bromine would displace iodine in potassium iodide.
Iodine and Calcium bromide
No. Bromine is more reactive than iodine. Therefore, bromine will displace iodine.
a displacement reaction
2KI+Br2 ---->2KBr +I2
Ethanol and NaBr. The delta negative OH dissociates from Sodium creating an +Na ion. The Bromine withdraws the electron density towards itself leaving the Carbon delta +. This means that the -OH will attack the +C removing -Br.
2NaI(aq)+Br2(l)-->2NaBr(aq)+I2(l) Sodium iodide+bromine-->sodium bromide+iodine
Its actually: 2KI(aq)+Br2(aq)-> I2(s)+2KBr(aq)
Iodine is lower in the halogen displacement series than bromine, i.e., iodine is less electronegative than bromine. However both chlorine and fluorine can displace bromine in sodium bromide, as they are more electronegative.
Br2 (g) + 2 KI (aq) 2KBr (aq) + I2 (s)
Bromine-Br Iodine-I iodine monobromide (IBr) Made by direct combination of the elements