factors affecting rate

• concentration of reactants

  • effect - increasing the concentration increases the rate of reaction
  • explanation - increases the chance of a collision as there are more particles
• pressure of gases

  • effect - increasing the pressure increases the rate of reaction
  • explanation - increases the chance of collision as there are more particles
• surface area of solid reactants

  • effect - increasing the surface area increases the rate of reaction
  • explanation - exposes more of the solid so that there is a greater chance of collisions occurring
• temperature

  • effect - increasing the temperature increases the rate of reaction
  • explanation - increases speed at which particles move and makes collisions more energetic
• catalyst

  • effect - catalyst increases rate of reaction
  • explanation - lowers the activation energy