Question

Give the formula and valency of aluminate.

Answer 1

A chemical formula is a representing way information using chemical element symbols, numbers, and often even other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs, regarding the chemical proportions of atoms that constitute a specific chemical compound or molecule.
We need to know that the valency is the estimate of the ability of atoms or molecules to combine. Therefore, the ability of an atom of a single element to react and to combine with unique numbers of atoms of another element is the ability of that atom.

Complete step by step answer:
We need to remember that in chemistry, the number of chemical bonds that can be formed by an atom of a certain element is valancy or valence. For a long time, individuals assumed that the element in question was a fixed property of this number. They believed there were always four bonds with carbon, there were always two with oxygen, and there was always one with hydrogen.
In chemistry, aluminate, such as sodium aluminate, is a compound containing aluminium oxyanion. A suffix indicating a polyatomic anion with a central aluminium atom is used for the classification of inorganic compounds.

Name	Formula	Valency
Aluminate	$AlO_2$	- 2

Amphoteric alumina is an aluminium oxide: it dissolves in both bases and acids. Hydroxy Aluminate ions, when dissolved in bases, are formed in the same way as aluminium hydroxide or aluminium salts. It is possible to precipitate hydroxy aluminate or hydrated aluminate and then calcinate it to create anhydrous aluminate. As a mixture of basic oxide and aluminium oxide, aluminate is also formulated.
Option C is correct option as molar mass is $17.04g$

Note:
With current techniques, alumina alone cannot easily be made glassy, but several forms of aluminium glasses can be produced with the addition of a second compound.
We know that a variety of interesting and useful properties are displayed in the glasses made, such as high refractive index, good infrared clarity, and high melting point, as well as the ability to host active and fluorescent laser ions. The main process used to research and manufacture several aluminium glasses is aerodynamic levitation.