Rates of Reaction - Marble Chips/Hydrochloric Acid

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1. The collision theory is...

  • When the meteor crashed to earth and killed all the dinosaurs.
  • The amount of time it takes for all of the particles in the experiment to collide.
  • When molecules collide the bonds between their atoms break and new bonds can form to make new molecules
  • When the molecules collide and dissolve each other so that only one chemical is left in the experiment.
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Other questions in this quiz

2. What is concentration?

  • The amount of activation energy needed.
  • The size of the solid reactant.
  • The amount of dissolved reactant.
  • The chemical that speeds up the reaction.

3. Catalysts work by...

  • Adding more reactants.
  • Lowering the activation energy/temperature needed for the reaction.
  • Breaking the solid reactants down.
  • Using themselves to start a reaction.

4. How does surface area affect the rate of reaction?

  • The particles need less activation energy to react.
  • The size of the particles means that they have more exposed sides.
  • The particles move faster.
  • There are more particles to collide with each other.

5. What does a catalyst do?

  • Make the particles move faster.
  • Double the reaction time in the experiment.
  • Speed up the reaction without being used up itself.
  • Increase surface area by breaking the particles into smaller pieces.


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