Write and balance the chemical equations for the synthesis of the triiodide and pentaiodide compounds.

Triiodide preparation:

3I2 + 4NH4OH → NI3 + 3NH4I + 4H2O

Pentaiodide preparation:

AS4 + 10I2 → 4ASI5

Explanation:

Nitrogen triiodide is an inorganic compound with formula NI3. It is an extremely sensitive explosive. The reaction obtained from iodine and ammonia is:

3I2 + 4NH4OH → NI3 + 3NH4I + 4H2O

Polyiodides can be manufactured by adding stoichiometric amounts of I2 to solutions containing I - and I3-, it requires the presence of cations to stabilize them. For example, in the preparation of pentaiodoarsorane from arsenic tetramer with iodine.

AS4 + 10I2 → 4ASI5