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Sodium Dihydrogen Phosphate Formula – Structure, Properties, Uses, Sample Questions

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  • Last Updated : 31 Mar, 2022
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Sodium is a first group element with a silvery-white appearance. It was first discovered and isolated in 1807 by Humphry Davy through the electrolysis of sodium hydroxide (NaOH). Sodium is used in the production of sodium borohydride, sodium azide, and indigo. It is also used as a heat exchanger in a few nuclear reactors. Even in the human body, sodium is utilized in the transmission of nerve signals and in maintaining a standard water levels in blood.

What is Sodium Dihydrogen Phosphate?

Sodium Dihydrogen Phosphate is an inorganic compound ,commonly used as an industrial chemical.It is also called as monobasic sodium phosphate or Monosodium phosphate.

Partial neutralization of phosphoric acid gives Sodium Dihydrogen Phosphate.

Structure of Sodium Dihydrogen Phosphate:

Structure of Sodium Dihydrogen Phosphate

Properties of Sodium Dihydrogen Phosphate

Physical properties of Sodium Dihydrogen Phosphate:

  • Sodium Dihydrogen Phosphate has a molecular weight of 120 g/mol.
  • Density is equal to 2.36g/cm3.
  • The color of Sodium Dihydrogen Phosphate is white and it is in powdered or crystalline form.
  • Sodium Dihydrogen Phosphate has a refractive index of 1.463.
  • The formula of Sodium Dihydrogen Phosphate is NaH2PO4.

Chemical Properties of Sodium Dihydrogen Phosphate:

  • Sodium Dihydrogen Phosphate on heating above 170°C produces Sodium acid pyrophosphate.

2NaH2PO4 → Na2H2P2O7 + H2O

 Uses of Sodium Dihydrogen Phosphate

  1. Sodium Dihydrogen Phosphate is used as an additive in food. It acts as an emulsifier and is added to evaporated milk, toothpaste, and livestock feed.
  2. Sodium Dihydrogen Phosphate is used as a detective, it helps in identifying magnesium ions.

Sample Questions

Question 1: Write the formula and structure of Sodium Dihydrogen Phosphate?

Answer:

The Formula of Sodium Dihydrogen Phosphate is NaH2PO4

Structure of Sodium Dihydrogen Phosphate

Question 2: Write a short note on Sodium Dihydrogen Phosphate?

Answer:

Sodium Dihydrogen Phosphate is an inorganic compound ,commonly used as an industrial chemical.It is also called as monobasic sodium phosphate or Monosodium phosphate .

Question 3: How is Sodium Dihydrogen Phosphate prepared?

Answer:

Partial neutralization of phosphoric acid gives Sodium Dihydrogen Phosphate.

Question 4: Explain how Sodium Dihydrogen Phosphate is used in identifying magnesium ions?

Answer:

If in a solution magnesium ions are present and Sodium Dihydrogen Phosphate is added to ammonium chloride and ammonium hydroxide in aqueous solution it gives a white precipitate.

Question 5 : List the properties of Sodium Dihydrogen Phosphate?

Answer:

The properties of Sodium Dihydrogen Phosphate are:

  • Sodium Dihydrogen Phosphate has a molecular weight of 120 g/mol.
  • Density is equal to 2.36g/cm3.
  • The color of Sodium Dihydrogen Phosphate is white and it is in powdered or crystalline form.
  • Sodium Dihydrogen Phosphate has a refractive index of 1.463.
  • The formula of Sodium Dihydrogen Phosphate is NaH2PO4.
  • Sodium Dihydrogen Phosphate on heating above 170°C produces Sodium acid pyrophosphate.

2NaH2PO4 → Na2H2P2O7 + H2O

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