Question

Structure of sodium tetrahydroxoaluminate(3

Answer 1

Answer:

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),[2] 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.[3][4]

Answer 2

Structure of sodium tetrahydroxoaluminate(3) is $Na[Al(OH)_4]$

Explanation:

Rules for naming of the coordination compounds :

The ligandsare named first then metal.

The charge of metal indicated with the Roman numerals and enclosed in the parenthesis after metal name.

The ligands are named in alphabetical order before the metal ion.

Ligands that include a numerical prefix in the name use the prefixes bis for 2, tris for 3, or tetrakis for 4 to indicate their number.

If the complex ion is an anion, we drop the ending of the metal name and add –ate.

For sodium tetrahydroxoaluminate(3) , sodium is outside the coordination sphere, Al is the aluminium metal, hydroxo is (OH).

Hydroxo has a charge of -1. As the overall complex is neutral the metal bears a +3 charge which is represented in Roman numeral after the metal. Thus the structure is $Na[Al(OH)_4]$

Learn more about naming of coordination compounds:

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