The iron and sulpher mixture glows when heated as it forms a compound

The iron and sulpher mixture glows when heated as it forms a compound

ZIMSEC O Level Combined Science Notes: Experiment:Making a mixture and compound

Aim: To Make a mixture of iron and sulpher and change it into a compound using heat

Materials: iron fillings, powdered sulpher, boiling tube, clamp stand, burner, magnet

Method

  1. Mix an equal amount of iron fillings and powdered sulpher
  2. Bring a magnet near the mixture
  3. Clamp the boiling tube/test tube to a stand
  4. Heat the mixture
  5. Stop heating as soon as the mixture begins to glow
  6. When the mixture has cooled down hold a magnet near the solid residue

Results and observations

  • When a magnet is brought near the mixture before it is heated the iron fillings are attracted to the magnet
  • When heat is applied the mixture continues to glow even after heat is removed
  • When a magnet is brought near the solid residue after it has been heated the iron fillings are not attracted
  • Before the mixture is heated the yellow sulpher and black iron fillings can be observed
  • A grayish residue remains after heating and the sulpher and iron fillings are no longer be observed

Conclusion

  • Mixing iron fillings and sulpher results in a mixture being formed
  • When heat is applied a new compound iron sulphide is formed

To access more topics go to the Combined Science Notes page.

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