Sodium hydrogen phosphate Formula

Sodium hydrogen phosphate formula, also named as Sodium phosphate dibasic formula or Disodium phosphate formula is discussed in this article. The molecular or chemical formula of Sodium hydrogen phosphate is Na2HPO4.

In its anhydrous form, it appears as is a white, odourless powder. It is hygroscopic and has a saline taste. In its hydrated form, it appears as a white crystalline solid which is odourless. This inorganic compound is soluble in water but insoluble in alcohol.

It can be obtained by neutralizing phosphoric acid (H3PO4) with sodium hydroxide NaOH. At the industrial scale, it is prepared in a two-step process.

Step 1 – Dicalcium phosphate is treated with sodium bisulfate, to give precipitated calcium sulfate

Step 2 – The obtained monosodium phosphate solution is neutralized partially.

Sodium hydrogen phosphate Formula Structure

Sodium hydrogen phosphate Formula

Properties Of Sodium hydrogen phosphate Formula

Chemical formula of Sodium hydrogen phosphate Na2HPO4
Molecular weight of Sodium hydrogen phosphate 141.96 g/mol (anhydrous)
Density of Sodium hydrogen phosphate 1.7 g/cm3
Appears as Crystalline solid
Melting point of Sodium hydrogen phosphate 250 °C

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Practise This Question

The wave function, Ψn,l,ml is a mathematical function whose value depends upon spherical polar coordinates (r, θ, Ф) of the electron and characterized by the quantum numbers n, l and m. Here r is distance from nucleus, θ is colatitude and Ф is azimuth. In the mathematical functions given in the Table, Z is atomic number and a0 is Bohr radius.

Column 1 Column 2 Column 3
(i) 1s orbital (i) Ψn,l,ml(Za0)32e(Zra0) (P)
(ii) 2s orbital (ii) One radial node (Q) Probability density at nucleus 1a30
(iii) 2 pz orbital (iii) Ψn,l,ml(Za0)52re(Zr2a0)cosθ (R) Probability density is maximum at nucleus
(iv) 3d2z orbital (iv) xy-plane is a nodal plane (S) Energy needed to excite electron from n = 2 state to n = 4 state is2732 times the energy needed to excite electron from n = 2 state to n = 6 state

For the given orbital in Column 1, the only CORRECT combination for any hydrogen-like species is