Sodium iodate hydrated

Strontium iodate furnishes two hydrates According to C. F. Rammelsberg, monohydrated strontium iodate, Sr(I03)2.H20, is formed as a white crystalline powder when hot soln. of strontium chloride and sodium iodate are mixed together and, according to A. Ditte, the same hydrate is formed by crystallization from cold nitric acid soln. C. F. Rammelsberg also claims that if soln. of strontium chloride and sodium iodate are mixed together in the cold, small crystals of hexa-hydrated strontium iodate are formed. 

Mayer s hemalum 1 g of hematoxylin, 50 g of aluminum potassium sulfate, 0.2 g of sodium iodate, 1 g of citric acid, 50 g of chloral hydrate, and 1 L distilled water. Dissolve the hematoxylin in distilled water using gentle heat, if necessary. Add the aluminum potassium sulfate, heat if necessary. Add the sodium iodate, mix well, and leave overnight. Then add citric acid, mix well, and add the chloral hydrate. 

A solution of 12g of barium chloride 2-hydrate in 100ml of water is mixed with 22g of potassium iodate (or 20g of the sodium salt) in an equal volume of boiling water. The resulting mixture is cooled thoroughly in an ice bath and suction-filtered. The residue is washed twice with 25ml of cold water and dried in warm air. 

Other Systems.—In the case of sodium sulphate there is only one stable hydrate. Other salts are known which exhibit a similar behaviour and we shall therefore expect that the solubility relationships will be represented by a diagram similar to that for sodium sulphate. A considerable number of such cases have, indeed, been found, and in some cases there is more than one metastable hydrate. This is found, for example, in the case of nickel iodate, the solubility curves for which are given in Fig. 76. As can be seen from the figure, suspended transformation occurs, the solubility curves having in some cases been followed to a considerable distance beyond the transition point. One of the most brilliant examples, however, of suspended transformation in the case of salt hydrates, and the sluggish transition... 

In alkaline solution the permanganate is decolourized, but (hydrated) manganese dioxide is precipitated. In the presence of sodium hydroxide solution, potassium iodide is converted into potassium iodate, and sodium sulphite solution into sodium sulphate on boiling. 

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