• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

To investigate how surface area effects the rate of reaction in Calcium Carbonate.

Extracts from this document...


An Nguyen 11P EXPERIMENT TO SEE HOW SURFACE AREA WILL EFFECT THE RATE OF REACTION Aim To investigate how surface area effects the rate of reaction in Calcium Carbonate. Theory This experiment is working on the theory of diffusion. Diffusion is the movement of particles. Three main things effect the rate of diffusion: - The distance of particles. Diffusion is quickest in gases as gas has a larger space between molecules making diffusion occur faster. - The energy of particles. The temperature effects the rate of reaction because the higher the temperature the faster the reaction. - The mass of particles. The effect of mass is caused by the relationship between the speed of particles and their temperature. Diffusion occurs in all the states of matter. However they most noticeably take place in liquids and gases. An example of this is Brownian Motion. Robert Browning noticed that when looking under a microscope pollen grains were moving in a random way. This movement is explained by assuming water molecules were hitting the pollen grains in a random way causing the pollen to move erratically. Brownian motion and diffusion provide evidence to support the kinetic theory. ...read more.


4. Repeat steps 1-3 with 10g of calcium carbonate and 40ml of hydrochloric acid. 5. Repeat steps 1-3 with 15g of calcium carbonate and 60ml of hydrochloric acid. Results 5g and 20ml of hydrochloric acid-Fast reaction and not very vigorous. 10g and 40ml of hydrochloric acid-Long reaction and very vigorous. 15g and 60ml of hydrochloric acid-Long reaction and quite vigorous. Conclusion: This pre-test showed me that the best results to use in my investigation would be 10g and 40ml of Hcl. This was because this was the most vigorous and the longest results without wasting too much Hcl and Calcium carbonate. Evaluation This pre-test was quite accurate. There was only one problem, acid was loss to the spitting I will use cotton wool to cover the top. The reason I will not use a cork stop is this will prevent all gas escaping. I will use wool because this will let gas escape but not acid. Prediction I predict that the large marble chips are going to take the longest to diffuse. The medium a fair amount of time to diffuse and the smallest chips will be the quickest to diffuse. ...read more.


- To rectify this I will observe more carefully when to start the timer. * The cotton's mass was not taken and deducted at the end. - I should next time take the mass of the cotton * Hydrochloric acid was not measured out properly. - I could maybe weigh the amount of hydrochloric acid used on some electronic scales. * Lots of people were in the room and were all walking about. People could have knocked the table causing the mixture to be swirled around a bit. Making the results slightly unfair. - I could possibly of done the experiment in a quite room on my own without distractions and lot's of people walking about knocking the table. * The Calcium carbonate chips were not all the same size. - When choosing the chips I could of looked for similar sized chips to use so surface area was still the same. However even with these factors taken into account the experiment gave me my expected results. So I presume that these flaws in my experiment did not really effect the results. To further on my work I could look at how a catalyst would effect the rate of reactions. I could also look at all the other factor such as temperature and concentration and how they effect the rate of reaction. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Patterns of Behaviour essays

  1. Marked by a teacher

    In this investigation we are going to measure the rate of reaction of marble ...

    3 star(s)

    Stop clock- to time when we need to write down results (every 20 seconds) ? Measuring cylinder- to measure out 20cm� of HCl ? Medium marble ? Safety goggles- to protect our eyes Reason for use of certain apparatus We used a gas syringe because it was a lot more

  2. Marked by a teacher

    What affects the rate of a reaction? The reaction I will be investigating is ...

    3 star(s)

    N/A 60 46 200 N/A 67 52 220 N/A 75 58 240 N/A 85 63 260 N/A 90 69 280 N/A 98 75 300 N/A 100 77 From this I can conclude that I will use medium sized chips. This is because I want to have a reasonable amount of

  1. Marked by a teacher

    The Effect of Concentration on the Rate of Reaction between Hydrochloric Acid and Calcium ...

    3 star(s)

    This means activation energy will not have an effect on this experiment. - Catalyst- A catalyst will lower the activation energy and makes more successful collisions, by weakening the bonds and increasing the rate of reaction. When the activation rate is lower not much energy is needed to make the reaction successful.

  2. The effect of surface area on the reaction rate between marble chips and hydrochloric ...

    Bhaktipriya Nayan Kapadia- Chemistry coursework Results Table: - A table to show how different size chips reacting with HCl Time (Seconds) Size of chips Amount of carbon dioxide produced (Cm3) Average 30 Small 25 25 35 28 Medium 15 15 12 14 Large 6 2 4 12 60 Small 50

  1. An investigation into how surface area affects the rate of reaction

    Set the apparatus as shown above. 2. I will measure out 25cm3 of 1 Mole of Hydrochloric Acid. I did this by using a measuring cylinder. 3. I will pour the acid into the conical flask. For safety I will wear goggles.

  2. To investigate the factors which affect the rate of reaction between marble chips and ...

    sufficient time at the beginning of the experiment for the gas to escape from the conical flask, while the bung was being put in place, although small, this could affect our results. Also miscounting the amount of CO2 in the measuring cyclinder produced every 15 secs.

  1. Prove that changing the surface area of calcium carbonate chips, either by increasing or ...

    The other key factors that could also have been as key variables in my experiment also have scientific explanations as to why they would affect my results. When the concentration of acid is decreased, the acid has fewer particles in it; therefore having fewer particles means the less effective collisions

  2. Investigating the rate of reaction between hydrochloric acid and calcium carbonate

    the initial rate(gradient) is the speed of the whole reaction and this is why I believe the graphs support my prediction. Calculations Calcium Carbonate + Hydrochloric Acid ---> Calcium Chloride + Water + Carbon dioxide. CaCo3 (s) + 2HCL(aq) ---> CaCl2(aq)

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work