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In order for a reaction to occur, the molecules of both the reacting molecules needs to collide.

Chemical reactions

A chemical reaction occurs when one or two substances combine to form new substances called products. There are different types of chemical reactions which include:

  • synthesis reaction,
  • decomposition reaction,
  • single replacement reaction, and
  • double replacement reaction.

For a chemical reaction to occur the following must take place:

  • Molecules must collide.

  • Molecules must collide with enough energy to begin to break the old bonds so new bonds can form.

  • Molecules must collide with the correct orientation.

Therefore, in order for a reaction to occur, the molecules of both the reactants and products needs to collide.

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