Worksheet: Collision Theory

In this worksheet, we will practice using collision theory to describe the effect of solvent, temperature, and concentration on reaction rates.

Q1:

Increasing the temperature usually causes the rate of a reaction to increase. Which of the following is not usually a cause of this effect?

  • AMolecules collide more frequently.
  • BChemical bonds vibrate more strongly.
  • CMore molecules exceed the activation energy for the reaction.
  • DElectrons are promoted to higher-energy orbitals.
  • EThe average kinetic energy of molecules is increased.

Q2:

When a molecule of O 2 collides with a molecule of C O , a molecule of C O 2 may be formed. Which of the following is not a requirement for this reaction to take place?

  • AThe molecules collide at an angle that allows for strong orbital overlap.
  • BThe kinetic energy of the colliding molecules exceeds the activation energy for the reaction.
  • CThe O 2 molecule collides with the carbon atom of the C O molecule.
  • DValence electrons in the C O molecule are excited to a higher energy level before the collision takes place.
  • EThe collision produces a transition state in which the original C O bond is lengthened.

Q3:

Magnesium reacts with aqueous hydrochloric acid to form aqueous magnesium chloride. Which of the following quantities could be reduced to increase the rate of this reaction?

  • AMagnesium mass
  • BTemperature
  • CAcid volume
  • DpH
  • EMagnesium surface area

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