Basic radicals of potassium plumbite and sodium meta-aluminate
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Basic radicals
Positively charged radicals are called a basic radical. Acid radicals are formed by removal of hydrogen ion (H+). Basic radicals are formed by the removal of hydroxide ion (OH–). Example: H2S04 loses one H+ ion to form HSO4– ion.
Sodium aluminate is an inorganic chemical that is used as an effective source of aluminium hydroxide for many industrial and technical applications. Pure sodium aluminate (anhydrous) is a white crystalline solid having a formula variously given as NaAlO2, NaAl(OH)4 (hydrated), Na2O·Al2O3, or Na2Al2O4. Commercial sodium aluminate is available as a solution or a solid.
Other related compounds, sometimes called sodium aluminate, prepared by reaction of Na2O and Al2O3 are Na5AlO4 which contains discrete AlO45− anions, Na7Al3O8 and Na17Al5O16 which contain complex polymeric anions, and NaAl11O17, once mistakenly believed to be β-alumina, a phase of aluminium oxide.
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