Surface Area

• How does increasing surface area increase the rate of reaction?


  If an object is split into smaller objects it has more/larger surface area

  This means that more particles are exposed and available for collisions so there are most collisions and a faster reaction
• How can the volume of gas produced be measured?


  Using a gas syringe
• What equipment is used to measure the volume of gas produced?

  Gas syringe
• What is the independent variable of the rate of reaction surface area investigation?

  The size of the chunks used e.g. limestone
• What is the dependent variable of the rate of reaction surface area investigation?

  How much gas is produced at set time intervals
• What are the control variables of the rate of reaction surface area investigation?

  -the acid (dilute)

  -concentration/volume of acid

  -reactants

  -gas syringe
• If the surface area of a reactant is increased:


  • more particles are exposed to the other reactant
  • there is a greater chance of particles colliding, which leads to more successful collisions per second
  • the rate of reaction increases
• Analysis of the rate of reaction surface area investigation:

  -small pieces reacted quicker

  -increasing the surface area increases the rate of reaction
• Why do small pieces of the acid react quicker than larger pieces?

  There are more particles at the surface; so there’s a larger surface area meaning particles collide more often/frequently
• Name the equipment

  Gas syringe

  
• Name the equipment

  Conical flask