#iodate

The above seen reaction was an oxidation with sodium periodate where a solid, high molar mass and poorly soluble salt is used as a reactant and sodium iodate is formed with similar physical properties. The reaction was performed under nitrogen atmosphere what was maintained by introducing a constant slow flow of nitrogen gas through a needle, as seen of the last picture. And this gas could be seen on the first picture, escaping from the reaction through the gas bubbler at the top. 

Iodised salt (also spelled iodized salt) is table salt mixed with a minute amount of various salts of the element iodine. The ingestion of iodine prevents iodine deficiency. Worldwide, iodine deficiency affects about two billion people and is the leading preventable cause of intellectual and developmental disabilities. Deficiency also causes thyroid gland problems, including “endemic goitre”. In many countries, iodine deficiency is a major public health problem that can be cheaply addressed by purposely adding small amounts of iodine to the sodium chloride salt.