Question

The phosphate of a metal has the formula $ MHP{O_4} $ ​, the formula of its chloride would be:
(A) $ MCl $
(B) $ MC{l_2} $
(C) $ MC{l_3} $
(D) $ {M_2}C{l_3} $

Answer 1

Hint: Metal phosphate covering is one of the significant surface change methods and has been economically misused on traditional metals, for example, $ Zn,{{ }}Fe $ and steel to improve their life expectancy in destructive conditions. Ordinarily, it is led in an acidic phosphate shower at room or raised temperatures.

Complete Step By Step Answer
 $ MHP{O_4} \to {M^{2 + }} + P{O_4}^{2 - } $
The valency of HPO4 has a valency of −2.
In this way, the valency of metal has a valency of +2.
The phosphate particle has a molar mass of 94.97 grams per mol, and comprises a central phosphorus molecule encompassed by four oxygen iotas in a tetrahedral game plan. It is the form base of the hydrogen phosphate particle.
 $ {M^{2 + }} + 2C{l^ - } \to MC{l_2} $
So, Option B is the answer.

Additional Information
The treatment of metal surfaces with phosphoric corrosive or phosphate salts to give a covering of insoluble metal phosphate gems is alluded to as phosphating. These coatings influence the appearance, hardness and electrical properties of the metal surface. They likewise give erosion obstruction and improve the grip of paint to the metal surface. Phosphate coatings are likewise used to give a base to oils or other rust preventive medicines, to give lubricity and protection from wear, as a base for glues in plastic-metal overlays, and to create a surface on steel that encourages shaping activities.

Note
The phosphating cycle is of major mechanical significance for the assurance of iron and steel surfaces and may likewise be applied as a defensive treatment for zinc, aluminum, cadmium and magnesium-based metals. Ordinary phosphating arrangements contain phosphoric corrosive, a phosphate salt $ \left( {MSP,{{ }}DSP,{{ }}or{{ }}SAPP} \right) $ and an assortment of quickening agents, for example, nitrates, nitrites, chlorates, peroxides, sulfites, molybdates, borates or citrates.