Why Does Sodium Metaaluminate Exist in Alkaline Solution

The chemical formula of sodium metaaluminate is NaAlO2, white, odorless, tasteless, with a melting point of 1650°C, a strongly alkaline solid, and the high-temperature melting product is a white powder, soluble in water, insoluble in ethanol, and easily absorbs water and carbon dioxide in the air After dissolving in water, aluminum hydroxide precipitates easily, and aluminum hydroxide dissolves in sodium hydroxide solution to form sodium metaaluminate solution. Used as a mordant for textiles, a filler for paper, and a purifier for water, etc. Available aluminum oxide and solid sodium hydroxide or sodium carbonate eutectic system. the
Sodium metaaluminate meets weak acid and a small amount of strong acid to form white aluminum hydroxide precipitate. The phenomenon is that a large amount of white precipitate is formed, and the amount of precipitate remains unchanged. When encountering an excessive amount of strong acid to generate the corresponding aluminum salt, the phenomenon is that a white precipitate is formed first, and after a period of time, the quality of the white precipitate gradually decreases and then disappears. Sodium metaaluminate does not interact with alkali, because it itself is alkaline due to the hydrolysis of metaaluminate ions, so it does not interact with alkali.