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Sodium Sulfide Formula

Explore more about the sodium sulphide formula with solved examples.

Sodium Sulfide

  • Sodium sulfide is a compound with the chemical formula Na2S

  • They are colourless and when dissolved in water they become strongly alkaline solutions

  • When exposed to moist air, sodium sulfide and its hydrates release strong hydrogen sulfide that smells like rotten eggs

  • Industrially, sodium sulfide is produced by the carbon thermal reaction of sodium sulphate with charcoal

Na2S

Sodium sulfide

Density

1.86g/cm2

Molecular Weight/ Molar Mass

78.0452g/mol

Autoignition temperature

>480 oC ( 896 oF; 753 K)

Melting Point

1,176 oC (2,149 oF)

Odour

Like rotten eggs

Appearance

Anhydrous yellow crystalline solids

pH

10.4

Oxidation number

-2

Solubility

Insoluble in ether; slightly soluble in alcohol

The chemical formula of Sodium Sulfide

Na2S

Chemical structure

Solved examples

  • What happens when sodium sulphide dissolves in water? 

It forms the corresponding ions

Na2S + H2O → 2Na+ + HS– + OH–

  • Can sodium sulfide be easily oxidised when heated?

Yes, it can, when heated it generally forms sodium carbonate and sulfur dioxide

2Na2S + 3O2 + 2CO2 → 2Na2CO3 + 2SO2

  • On reacting with sulfur it forms polysulfides

2Na2S + S8 → 2Na2S5

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Frequently asked questions

Get answers to the most common queries related to the Sodium Sulfide Formula.

State the use of sodium sulfide?

Ans. Sodium sulfide is mainly used in handicrafts in the pulp and paper industry. It increases the selectivity of th...Read full

How can we make sodium sulfide?

Ans. In the laboratory, salts can be prepared by reducing sulfur with sodium in anhydrous ammonia or with sodium in ...Read full

What does 1% Sodium Sulfide do?

Ans. 1% sodium sulfide is used in the pulp and paper industry, water treatment, textile industry, and various chemic...Read full