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

An Investigation into what factors affect the amount of Carbon Dioxide produced in the reaction between Marble Chips and Diluted Hydrochloric Acid.

Extracts from this document...


An Investigation into what factors affect the amount of Carbon Dioxide produced in the reaction Between Marble Chips and Diluted Hydrochloric Acid Aim The aim of this experiment is to see if by changing the factors of experiment, will it affect the amount of CO produced by the reactions. The factors are that we can change the concentration of the acid (hydrochloric acid), which is the factor I have changed, but there are many more variables, as we will see later on in the investigation. Background Equation In this experiment the collision theory is used. This is way to prove that from this theory the rate of reaction will increase as the concentration increases and so the yield will increase. This will happen if the marble chips are in excess and so the yield of gas will then be high, but if the acid is in excess then the yield of gas will be the same. We do know that if the concentration of acid is increased, the reaction will go faster. We can see why from these diagrams. In the first diagram we have very few acid particles and so this means that there is not much of a chance of an acid particle hitting a calcium atom. In diagram two the acid is more concentrated so there are more acid particles and there is now a bigger chance of a collision happening. In the diagram there is a collision happening and if there is enough energy, there will be a reaction, which will successfully happen. If the energy is too low then the particle will bounce off and start again. ...read more.


They would only be affected if the crystal were really too big. The volume and the weight were controlled by being accurate and take time to get the right amounts. The temperature I could not control, but the temperature in the room stay about constant so it did not affect the experiment. I used the same acid from the same batch we were given. The safety measures taken were to wear safety specs and the hydrochloric acid is an irritant and harmful. So we stood up while working and we did not splash the chemicals around and we cleaned up if some were spilt and the same with broken glass. While the experiment was in progress we stood away from it. Obtaining Evidence I change my method first by doing more concentrations, I did more concentration so I could give a bigger range of results and so that I could compare the result better as there would be a clearer pattern by doing more test. Also I did some repeats so I could get an average result do I could plot it as one line on the graph. I will measure to the near whole number and to no decimal place as it will be easy to read of cylinder and the margin of error is reduced. The evidence is as reliable as I could get it with the apparatus. Also with the fact that there will be soon human error in the experiment and so it is not all down to the apparatus. As you can see by the table below there are lots of readings and so there should be sufficient data. ...read more.


The results were 6 to 10 cm of gas out every time, which is to do with the same reasons as above. One big problem was collecting the gas, because as it had to be full of water it was hard to put an upturned cylinder into the water without losing some water and so making the results less accurate and not reliable. The chip sizes were all different so I could not get a constant surface area so it meant that this would affect my result, as the amounts of gas would be different. The temp of the room could not be control so this may have affected the experiment, but I think the temp was about constant though out the experiment. The chip sizes were all different, but I tied to get the smallest chips so getting a bigger surface area. The way I changed the concentrations meant that the concentrations were not 100% correct so the result cannot be 100% accurate and reliable. There was a good amount of data produced and the only way of getting a better conclusion is by doing more repeat, but also get better apparatus e.g. more accurate and reliable. The improvements are that the corks fit the test tubes so that gas will not escape. Also get chips, which are about the same size. Better way of collecting the gas more accurately. The extension work can be that we use different acids to see the difference between them. Also we could see how heat affects the experiment. We could also do different surface areas to see which one will produce the most gas in a certain time limit. We could final to higher concentrations such as 3 and 4 molar to see the differences. ...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)

    ? Next we put the marble chips (calcium chloride) into the acid in the conical flask, this has to be done very fast and the bung be put on straight away as to make it a fair test little gas (CO2) should escape. ? We then proceeded to take measurements of the volume of CO2 produced every 20 seconds for 10 minutes (600seconds).

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

    someone else in the lab is using a Bunsen burner, or knocking over equipment that happens to be lying around. we have to be careful because the acid is highly corrosive to our bodies and should be kept away from skin and from our clothes.

  1. The aim of the investigation is to examine the kinetics involved in the reactions ...

    This ensured the reaction was completed with no disturbance to the final calculations on the activation energy. The concentrations of acid are made to the nearest 0.01 mol dm -3. Error for 1.00 M acid = 0.01 / 1.00 x 100 = 1.00% The temperature changes were observed by placing

  2. Investigate the effect of changing the concentration of hydrochloric acid and the volume of ...

    The diagram below gives an idea about activation energy. The diagram below shows how concentration affects the rate of reaction. Apparatus * 1 stand and 1 clamp * 1 water trough * 1 500Ml glass measuring cylinder * 1 100Ml glass measuring cylinder * 100 Ml plastic measuring cylinder * 1 250 Ml conical flask with bung with hole

  1. An Investigation to determine the factors which affect the rates of reaction between Marble ...

    into the using a measuring cylinder or smaller cylinders into a conical flask, using the correct amounts of distilled water and 2.M HCL ii) place on scale, and reset the scale using the 'tare' function so that it reads 0.00g iii)

  2. Find out how the rate of hydrolysis of an organic halogen compound depends on ...

    If a graph of 1/t is plotted against the concentrations of the thiosulphate solutions used, a straight line plot is obtained, showing that the rate of the reaction is proportional to the concentration of sodium thiosulphate. Rate equations and reaction mechanisms: Once the rate equation for a reaction is known, it can be linked to the reaction mechanism.

  1. Investigating the Different Factors That Affect the Rate of Reaction Between Marble Chips and ...

    As you can see from my word equation on the first page, none of the reactants is a gas (calcium carbonate is a solid and hydrochloric acid is a solution). 3. Surface area- of CaCO3 was not used since the surface area of the small marble chips was large enough to obtain a good set of results.

  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