Class 10 Chemistry Chemical Reactions and Equations Chemical equation

Chemical equation

Describing all of the chemical reactions that occurs around us in words is quite impossible.

Like if you want to depict rusting of iron. Instead of writing the phenomenon in sentences, you can simply write it as


This is known as word equation. And it itself describes the whole phenomenon of rusting. Through this we can conclude that iron on reacting with oxygen and water present in atmosphere undergoes chemical transformation and gets converted to ferric oxide i.e. Rust.

Points to be kept in mind while writing chemical reaction.

  • In a word equation the reactants are always written on the left hand side with plus sign in between the reactants.
  • The product is written on the left hand side.
  • In between reactants and products lies the arrow sign.
  • The arrow head points towards the direction of reaction.
  • You can also add the conditions and catalysts required to perform the reaction above and below the arrow sign.

Fig. Types of arrows used in chemical equation

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