Chlorine and iodine are elements in the same group in the periodic table. Chlorine gas is a yellow while aqueous, iodine , #I_2(aq)# is brown.
(a) What observation would be made if chlorine gas is bubbled through aqueous sodium iodide?
Explain using an ionic equation.
(b) Under certain conditions chlorine and iodine react to give iodine trichloride, #ICl_3(s)#. What type of bonding would you expect to exist in iodine trichloride? Explain.

Answer:

a)- The colourless solution would turn brown. This is because chlorine displaces iodine from iodine solution.
#Cl_2(g)+2I^(-)(aq)rightarrow2Cl^(-)(aq)+I_2(aq)#

b)- Covalent bonding. This is because it

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