Practical: Effect of Surface Area on Rate of Reaction (Edexcel IGCSE Chemistry)

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Practical: Effect of surface area on rate of reaction

Aim:

To investigate the effect of changing surface area on the rate of reaction

Diagram:

Effect of Surface Area on a Reaction Rate 1, downloadable IGCSE & GCSE Chemistry revision notesEffect of Surface Area on a Reaction Rate 2, downloadable IGCSE & GCSE Chemistry revision notesEffect of Surface Area on a Reaction Rate 3, downloadable IGCSE & GCSE Chemistry revision notes

Investigating the effect of different size marble chips on the rate of reaction between calcium carbonate and hydrochloric acid

Method:

  1. Add a fixed volume of hydrochloric acid into a conical flask
  2. Use a delivery tube to connect this flask to an inverted measuring cylinder
  3. Add marble chips into the conical flask and close the bung
  4. Measure the volume of gas produced in a fixed time using the measuring cylinder
  5. Repeat with different sizes of marble chips

Results:

  • Record your results in a table like this

    Size of marble chip  Volume of gas produced in 30 seconds (cm3)
       
       
       
       

Conclusion:

  • Increasing the surface area of the marble chip, increases the rate of reaction 
  • This is because more surface area particles of the marble chips will be exposed to the dilute hydrochloric acid so there will be more frequent and successful collisions, increasing the rate of reaction

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Stewart

Author: Stewart

Expertise: Chemistry Lead

Stewart has been an enthusiastic GCSE, IGCSE, A Level and IB teacher for more than 30 years in the UK as well as overseas, and has also been an examiner for IB and A Level. As a long-standing Head of Science, Stewart brings a wealth of experience to creating Exam Questions and revision materials for Save My Exams. Stewart specialises in Chemistry, but has also taught Physics and Environmental Systems and Societies.