Question

natue and colour of na2so4​

Answer 1

NATURE-
Sodium sulfate (also known as sodium sulphate or sulfate of soda) is the inorganic compound with formulaNa2SO4 as well as several related hydrates. All forms are white solids that are highly soluble in water. With an annual production of 6 million tonnes, the decahydrate is a major commodity chemical product.

COLOUR-
white crystalline solid hygroscopic

Answer 2

Sodium sulfate

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Sodium sulfate

Sodium sulfate.svg

Sodium sulfate.jpg

Names

Other names

Sodium sulphate

Sulfate of sodium

Thenardite (mineral)

Glauber's salt (decahydrate)

Sal mirabilis (decahydrate)

Mirabilite (decahydrate mineral)

Disodium sulfate

Identifiers

CAS Number

7757-82-6 ☑

7727-73-3 (decahydrate) ☒

3D model (JSmol)

Interactive image

ChEBI  

CHEBI:32149 ☑

ChEMBL  

ChEMBL233406 ☑

ChemSpider  

22844 ☑

ECHA InfoCard 100.028.928

E number E514(i) (acidity regulators, ...)

PubChem CID

24436

RTECS number WE1650000

UNII  

36KCS0R750 ☑

InChI[show]

SMILES[show]

Properties

Chemical formula

Na2SO4

Molar mass 142.04 g/mol (anhydrous)

322.20 g/mol (decahydrate)

Appearance white crystalline solid  

hygroscopic

Odor odorless

Density 2.664 g/cm3 (anhydrous)

1.464 g/cm3 (decahydrate)

Melting point 884 °C (1,623 °F; 1,157 K) (anhydrous)  

32.38 °C (decahydrate)

Boiling point 1,429 °C (2,604 °F; 1,702 K) (anhydrous)

Solubility in water

anhydrous:  

4.76 g/100 mL (0 °C)

13.9 g/100 mL (20 °C)[1]

42.7 g/100 mL (100 °C)

heptahydrate:  

19.5 g/100 mL (0 °C)  

44 g/100 mL (20 °C)

Solubility insoluble in ethanol  

soluble in glycerol, water and hydrogen iodide

Magnetic susceptibility (χ)

−52.0·10−6 cm3/mol

Refractive index (nD)

1.468 (anhydrous)  

1.394 (decahydrate)

Structure

Crystal structure

orthorhombic or hexagonal (anhydrous)  

monoclinic (decahydrate)

Pharmacology

ATC code

A06AD13 (WHO) A12CA02 (WHO)

Hazards

Main hazards Irritant

Safety data sheet See: data page

ICSC 0952

NFPA 704  

NFPA 704 four-colored diamond

010

Flash point Non-flammable

Related compounds

Other anions

Sodium selenate

Sodium tellurate

Other cations

Lithium sulfate

Potassium sulfate

Rubidium sulfate

Caesium sulfate

Related compounds

Sodium bisulfate

Sodium sulfite

Sodium persulfate

Supplementary data page

Structure and

properties

Refractive index (n),

Dielectric constant (εr), etc.

Thermodynamic

data

Phase behaviour

solid–liquid–gas

Spectral data

UV, IR, NMR, MS

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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Infobox references

Sodium sulfate (also known as sodium sulphate or sulfate of soda) is the inorganic compound with formula Na2SO4 as well as several related hydrates. All forms are white solids that are highly soluble in water. With an annual production of 6 million tonnes, the decahydrate is a major commodity chemical product. It is mainly used for the manufacture of detergents and in the kraft process of paper pulping.[2]

Forms

Anhydrous sodium sulfate, known as the rare mineral thenardite, used as a drying agent in organic synthesis.

Heptahydrate sodium sulfate, a very rare form.

Decahydrate sodium sulfate, known as the mineral mirabilite, widely used by chemical industry. It is also known as Glauber's salt.

Chemical properties

Sodium sulfate is a typical electrostatically bonded ionic sulfate. The existence of free sulfate in solution is indicated by the easy formation of insoluble sulfates when these solutions are treated with Ba2+ or Pb2+ salts:

Na2SO4 + BaCl2 → 2 NaCl + BaSO4

Sodium sulfate is unreactive toward most oxidizing or reducing agents. At high temperatures, it can be converted to sodium sulfide by carbothermal reduction (high temperature heating with charcoal, etc.):[6]