1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  • Level: GCSE
  • Subject: Science
  • Essay length: 2279 words

Investigation into the effect of concentration on the rate of reaction between calcium carbonate and hydrochloric acid

Extracts from this essay...


Investigation into the effect of concentration on the rate of reaction between calcium carbonate and hydrochloric acid. Introduction Equation: Calcium carbonate + hydrochloric acid carbon dioxide + water + calcium chloride CaCO + HCl CO + H O + CaCl During this reaction Carbon dioxide is formed. We measured the rate of reaction by collecting the Carbon dioxide in a gas syringe and timing how long it takes to collect 30cm of gas in the gas syringe. Variables that Affect the Rate of Reaction: -Concentration- if there is a higher concentration of acid then there will be a faster rate of reaction because there will be more reactant particles per unit volume, so there will therefore be more successful collisions occurring. -Temperature- if the temperature is higher there will be a faster reaction rate. This is because the average kinetic energy of the particles will be higher and therefore the collisions will have more energy so successful collisions will increase. -Size of chips (surface area)- If the marble chips are larger then there will be more surface area exposed and so there will be a faster reaction rate due to more successful collisions occurring. -Catalyst- A catalyst lowers the energy needed for successful collisions. So the reaction rate will therefore be faster.


If the concentration is higher then there will be more particles per unit volume. Observations The only possible anomaly that I can see from the preliminary results table is the result for time taken to collect 30cm of gas, and the concentration of acid being 12. Results for actual experiment. Concentration of solution moles dm 3 Volume of Acid moles dm 3 (cm ) Volume of Water (cm ) Time taken to collect 30cm of gas (s) (1st test) Time taken to collect 30cm of gas (s) (2nd test) Time taken to collect 30cm of gas (s) (3rd test) Average time taken to collect 30cm of gas (s) 2.0 20 0 6 7 8 07.00 1.8 18 2 9 9 10 09.33 1.6 16 4 11 10 10 10.33 1.4 14 6 13 12 11 12.00 1.2 12 8 15 10 14 13.00 1.0 10 10 18 17 19 18.00 Rate of reaction: 1/time Concentration of solution moles dm 3 Rate of reaction s 1 2.0 0.14 1.8 0.11 1.6 0.10 1.4 0.08 1.2 0.08 1.0 0.06 Analysing I have found from my results that my prediction was correct and that as the concentration of acid increases, the rate of reaction increases, and as the concentration of acid decreases, the rate of reaction decreases.


There are still some factors that could cause an anomaly using this method, for example, human error. Reactions could be delayed when starting the stop clock. Other anomalies could have been because the gas syringe could have stuck, also, even though we did our best to keep the chips the same size, we could not guarantee they would be the correct size. This would alter the rate of reaction to make it faster or slower. We could possibly have ruled this out by getting a machine to cut the marble chips into precise sizes, but this would take a long time and would be impractical, and is therefore beyond our control. The temperature could also have changed, even though we attempted to keep it the same, although we did not measure the temperature with a thermometer. This was also beyond our control as we did not have the equipment to keep the temperature at a constant level. Another problem that we found was that one of the boiling tubes broke during the experiment and a small bit of glass had fallen out of the bottom of it. This was faulty equipment. Other than these possible reasons I can conclude that the experiment as fairly and accurately as possible with the equipment and conditions that we were operating in, and that the results are valid. ?? ?? ?? ?? Charlotte Bell 10A

The above preview is unformatted text

Found what you're looking for?

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

Not the one? Search for your essay title...
  • Over 180,000 student essays
  • Every subject and level covered
  • Thousands of essays marked by teachers

Related GCSE Patterns of Behaviour

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

    There was a difference of 3.02 cm3 this is still has proved my prediction. Fourth experiment-unfortunately in these series of results it did not turn how it should have because medium chips rate of reaction was 0.76 cm3 /s. The small chip's rate of reaction was- 1.34 cm3 /s, whereas the powdered chips rate of reaction was 0.81 cm3 /s.

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

    we decided we should improve the experiment by adding a larger amount of calcium carbonate because the ratio of hydrochloric acid and water was too much so increasing the the calcium carbonate. We changed our calcium carbonate size because 0.1 was too small and we couldnât observe the reaction to

  1. The Iodine Clock Investigation

    were placed in the water bath, and left until their solutions were both at a temperature of 50°C. Once the contents of both tubes had reached this temperature, the were mixed and left in the water bath. The time taken for the reaction to finish was recorded, and the experiment was repeated for a second time at 50°C.

  2. Marked by a teacher

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

    3 star(s)

    energy to collide with one another, therefore I will use the largest surface area, because these results show that a faster reaction is gained from the small marble chips. This by allowing a faster reaction in this investigation if the particles have more area to collide with.

  1. Effect Of Substrate Concentration On The Activity Of Catalase

    Apart from these few improvements I think the equipment and the method I used was an appropriate way of investigating how concentration effects the rate of reaction on an enzyme. A variable that I could try for an extra experiment is temperature.

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

    The bung is there to make sure that the gas being produced, does not escape from the conical flask. Preliminary experiment For the preliminary first experiment we did was calcium powder 1g, and hydrochloric acid 50ml of 1M. For the second experiment we used 1g of calcium powder, and 30ml of 1M hydrochloric acid.

  1. To investigate the effect of varying the masses of white sugar and yeast and ...

    The slope continued to rise in this gentle manner as the mass rose to 8000mg and then became comparatively more steep when the mass rose to 10,000mg indicating the rise of the rate from 0.038 ml/sec to 0.041 ml/sec. The steepest slope was the increase in the mass of sugar from 0 to 2000mg.

  2. Investigating the effect of enzyme concentration on the hydrolysis of starch with amylase.

    Ensuring each test tube is clearly labelled and placed in the test tube rack, take one concentration at a time, start with 0.5%. Collect a stop clock, which will be use the time it takes (in seconds) for a reaction to happen.

  • Over 180,000 essays
    written by students
  • Annotated by
    experienced teachers
  • Ideas and feedback to write
    your own great essays

Marked by a teacher

This essay has been marked by one of our great teachers. You can read the full teachers notes when you download the essay.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review on the essay page.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review under the essay preview on this page.