General Biology I

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Reactants

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General Biology I

Definition

Reactants are the starting substances that undergo chemical changes in a reaction. They are present before the reaction begins and are transformed into products.

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5 Must Know Facts For Your Next Test

  1. Reactants are consumed during a chemical reaction.
  2. The amount of reactants determines the quantity of products formed.
  3. Reactants can be elements, compounds, or molecules.
  4. In a balanced chemical equation, reactants are listed on the left side.
  5. The rate at which reactants are used up can affect the speed of the reaction.

Review Questions

  • What role do reactants play in a chemical reaction?
  • Where are reactants found in a balanced chemical equation?
  • How do reactants affect the quantity of products formed?
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