• Source: Ammonium iodate

Ammonium iodate is an inorganic salt which is sparingly soluble in cold, and moderately soluble in hot water, like all iodate salts, it is a strong oxidizer.




Preparation


Ammonium iodate can be obtained by neutralising a solution of iodic acid with ammonia.

HIO3 + NH3 → NH4IO3
Using its low solubility in water, it can also be precipitated from an iodate solution with an ammonium salt.

2 KIO3 + (NH4)2SO4 → 2 NH4IO3 + K2SO4
Unlike other iodates, ammonium iodate can't be prepared by dissolving iodine in an ammonium hydroxide solution, instead the highly explosive nitrogen triiodide is formed.

3 I2 + 5 NH3 → 3 NH4I + NH3·NI3




Chemical properties


Because ammonium iodate consists of the reducing ammonium ion and the oxidizing iodate ion, it already starts to decompose at 150 °C into nitrogen, oxygen, iodine and water.

NH4IO3 → ⁠1/2⁠N2 + ⁠1/2⁠O2 + ⁠1/2⁠I2 + 2H2O
Below 60 °C this reaction cannot sustain itself, but with catalysts like potassium dichromate or copper(II) chloride it can also combust at room temperature.




Safety


Like all iodates, ammonium iodate is a strong oxidizer and should therefore be kept away from flammable materials like sulfur, phosphorus and metals powders




References

Kata Kunci Pencarian:

• Bilangan oksidasi
• Kamus rumus kimia
• Ammonium iodate
• Ammonium nitrate
• Iodine clock reaction
• Promethium iodate
• Lanthanum(III) iodate
• Solubility table
• Dough conditioner
• List of inorganic compounds
• Chemical oxygen demand
• Salter Science