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

How does the concentration of acid affect the rate of a reaction with calcium carbonate?

Extracts from this document...

Introduction

How does the concentration of acid affect the rate of a reaction with calcium carbonate? Calcium + Hydrochloric => Calcium + Carbon + Water Carbonate Acid Chloride Dioxide CaCO3 (s) + 2HCl (aq) => CaCl2 (aq) + CO2 (g) + H2O (l) Introduction I will be using the reaction between calcium carbonate and hydrochloric acid to see how the concentration of acid affects the rate of a reaction. By doing the above experiment I will prove that the higher the concentration of acid, the faster a reaction will occur. I have carried out a previous experiment called the 'Disappearing Cross', in which I used the reaction between thiosulphate, hydrochloric acid and water to see how concentration affects the rate of reaction. When we added the hydrochloric acid to the water and thiosulphate a reaction occurred, causing the water to become foggy so that the cross was no longer visible through the conical flask. The results for the Disappearing Cross experiment were as follows; Volume of Thiosulphate (Cm3) Volume of Water (Cm3) Volume of HCl (Cm3) Concentration (%) Time taken for X to disappear (seconds) ...read more.

Middle

When there is a low concentration the particles are more spread out so collide less, therefore less successful collisions occur. Below is a diagram showing the collision theory and the differences in reaction rates with high and low concentration. I have also used the results from my 'Disappearing Cross' experiment to help me come to this prediction. As you can see in the graph below showing the results I collected from the experiment this shows that the greater the concentration the faster the reaction time. As you can see here the graph shows a correlation between the concentration and time taken for the cross to disappear. It shows that the higher the concentration the quicker the reaction time, supporting what I predict will happen with the experiment between hydrochloric acid and calcium carbonate. Results The result table on the previous page shows the results I collected during the experiment. Analysis Of Results My table of results collected from the experiments done show that as the concentration of acid increases the rate of reaction also increases. This is because when the concentration is increased there are more molecules to react causing more successful collisions and the quicker the reaction energy is used up, causing there to be a faster reaction time than there would be if the concentration was lower. ...read more.

Conclusion

As you can see on our graph the axis showing the experiments done with 15cm3 and 20cm3 of HCl are very close and according to the general pattern in results, shouldn't be. Ways of avoiding the gas syringe sticking would be to make sure that the clamp isn't too tight around it or you could use a different method of collecting the gas, where you fill a measuring cylinder full of water and place it upside down in a water bath with a tube that the gas can travel through and displace the water in cylinder, allowing you to measure the gas collected. Another error that may have occurred is a transcription error, where someone may have written down incorrect results or misread the stopwatch or gas syringe. There will also be timing errors where the stopwatch was started at different points or the bung hasn't been put on the conical flask quick enough but these are just because of human reactions and are generally unavoidable. In summary I think that the experiment we did was sufficient for the purpose we needed and concluded the theory that Higher concentration = Quicker reaction ~ 1 ~ ...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

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

    3 star(s)

    105 61 115 120 74 132 135 85 145 150 99 20 165 115 210 These results occurred because the collision theory suggests that the larger the surface area the more area there is for the particles in the hydrochloric acid to cause molecular collisions with surface of the calcium carbonate.

  2. Free essay

    How does Concentration affect the rate of reaction between Hydrochloric Acid and Calcium Carbonate

    only took 15 seconds to complete. We then decided on taking a result every 2 seconds, however, by the time we got to our last experiment (20%HCl, 80% H2O)

  1. Investigate how concentration of hydrochloric acid (HCL) affects its reaction with calcium carbonate (CaCO3).

    readings changing the molar of the hydrochloric acid, and the size and mass of calcium carbonate chips each time. These readings will be taken from the reaction between hydrochloric acid and calcium carbonate. Mass of CaCO3 (g) Size of Chip (L, M, S)

  2. The Effect of Concentration on the Rate of Decomposition of Calcium Carbonate.

    The only things I changed were the size and the mass of the calcium carbonate. I changed the size of the calcium carbonate chips because the medium size still had, quite a large surface area so they reacted to quickly for me to get enough results for the experiment to be accurate.

  1. An Experiment to show the reaction between Hydrochloric acid and Calcium Carbonate

    The next step we did was to measure out the Calcium Carbonate chips. This was done by firstly putting the conical flask onto the measuring balance. Then clearing the clean to eliminate the flask's fate. Then the chips were dropped in until the weight either read 2.5g or near that number (2.4g - 2.6g).

  2. How does the concentration of HCl affect the rate of reaction with CaCO3?

    We noted down the temperature of the hydrochloric acid in the buckler flask before the reaction. 10. We then put the powdered marble into the buckler flask with an attached delivery tube and put a bung on top of it.

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

    there were 5 curves which represented the 5 different concentrations I calculated the gradient on this graph because to plot the second graph which was the initial rate against the concentration this would allow me to find the exact rate of reaction for each concentration.

  2. An Investigation: Factors That Affect The Rate Of Reaction between Calcium carbonate and Hydrochloric ...

    Using another piece of equipment, for example a spoon, would be too large to fit through. 1. Weighing Boat: -We placed the calcium carbonate in the weighing boat before we measured it. The weighing boat is light and will not affect how we measure the calcium carbonate.

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