Sources sulfur

  • By-product of petroleum and natural gas refining
  • Occurs in sulphide ores e.g. lead sulphide
  • Underground sulfur beds
  • Volcano rims


Sulfur Sulfur Dioxide
Rubber vulcanization As a bleach for wood pulp in the manufacture of paper
In car batteries as an electrolyte Food preservative; kills bacteria
Manufacture of sulphuric acid ( Contact Process) Metal and ore refining (reducing agent)

Sulphuric acid

Sulphuric acid is a colourless liquid, strong, non-volatile acid. It is a very strong oxidising agent i.e. it can oxidize both metals and non-metals (bases) forming salts (sulphates). Its soluble in water and emits heat when dissolved. It can be used as a dehydrating agent as it absorbs water.

Contact Process

Factors employed to increase yield of Sulphur trioxide

     Temperature- 450 0C (low)
     Pressure- 1atm,
     Catalyst- vanadium(v) oxide (it speeds up the rate of reaction).


❶ Formation of Sulphur dioxide

Sulphur is reacted with oxygen to form sulphur dioxide.
S(g) + O2 → SO2(s)


❷ Formation of Sulphur trioxide

SO2 is further reacted with oxygen to form sulphur trioxide in a reversible reaction (going both directions).
2SO2 + O2(g) ⇋ 2SO2(g).


❸ Formation of oleum

Sulphur trioxide is cooled and reacted in concentrated sulfuric acid to produce oleum,
SO3 + H2SO4 → H2S2O7.
When sulfur trioxide is reacted with water it forms a mist sulfuric acid.

❹ Formation of Sulfuric Acid

Oleum is diluted with water to form sulphuric acid.

H2S2O7 + H2O → 2H2SO4


Properties of Sulfuric Acid

    • Concentrated H2SO4  is a strong oxidizing and dehydrating agent
    • Corrosive when concentrated
    • Low pH (turns blue litmus red)
    • High electrical conductivity


Uses of Sulphuric acid

Concentrated Diluted
Used in phosphate fertilizers Cleaning metal surfaces
Production of paints and dyes Catalyst in organic reactions

  • in making detergents
  • to manufacture plastics and fibres
  • in refining petroleum
  • as electrolyte in car battery
  • galvanization and electroplating
  • in production of dyes, drugs, explosives…



I every time used to read post in news papers but now as I am a user
of internet thus from now I am using net for articles, thanks to web.

My site :: vpn special coupon code 2024


Hello, its pleasant article regarding media print,
we all know media is a fantastic source of data.

My website :: vpn special coupon code 2024


Hello there, I discovered your web site by way of Google even as
looking for a similar topic, your web site
got here up, it seems to be great. I have bookmarked it in my
google bookmarks.
Hi there, just become aware of your weblog via Google, and located that it is really informative.
I’m going to watch out for brussels. I’ll appreciate if you continue this in future.
Many other people can be benefited from your writing.


Leave a Reply

Your email address will not be published. Required fields are marked *