• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9

Chemistry Rates Of Reaction Marble chips and Hydrochloric acid

Extracts from this document...

Introduction

Year 11 Chemistry Rates of Reaction Coursework Planning How does changing the concentration of a substance effect the rate of reaction? Planning: This science coursework is an experiment, it will explore the rates of reactions, factors affecting the results and highlighting and explaining possible conclusions for any anomolies. It involves measuring and recording results in experiments that we have done in lessons, and then analysing the results in this coursework. The experiment is fairly simple but I will state the method and equipment we used to complete the exercise below. To ensure the test is fair, we must ensure the variables are kept the same throughout all the experiments. To ensure the test is as impartial as practicallity allows, I will ensure the temperature, acid concentration, surface area and timeing are all constant. This will ensure my results are as accurate as I can achieve. The experiment involves using hydrochloric acid (acidic) and marble chip (alkali). We are going to put both reactants into a chonical flask and collect the gas that will be given off. This will allow us to see which reaction is faster with different strenghts of hydrochloric acid, and also lets us compare results and draw realistic conclusions whilst we are doing each one. ...read more.

Middle

A recent study shown that most accidents in the lab occur whilst packing up. Also at this time people remove their goggles to pack up. This is especially dangerous as substances can get tipped into a sink and shoot back up into the face. To minimise the chance of injury I will ensure I wear googles from the begginning of the session until all the equiptment has been put away. Preliminary Work: Before I completed all my results, I couldn't get accsess to a gas syringe. I had to use a measuring cylinder and a plastic container to measure results. I found this was harder to measure and record, so I decided I would only use a gas syringe. Obtaining Evidence: To record my results as accurately as possible I designed the below table. I think it is handy as you can clearly record results and easily interpret the data on a graph. Experiment one: Experiment two: Time (secs) 0.1M 0.5M 1M 1.5M 2M 10 0 0 0 0 0 20 0 4 0 7 9 30 0 9 3 14 13 40 0 10 6 18 22 50 0 11 10 24 26 60 0 13 14 39 31 70 0 17 20 40 38 80 0 18 22 41 44 90 0 22 27 46 49 100 0 23 32 52 53 110 0 24 38 59 61 120 1 24 44 67 77 Time (secs) ...read more.

Conclusion

This however wasn't the case, as our graphs do not show anything which looks out of place or wrong. I was expecting some anomalies which could occur from human error of recording results, dirty equipment, the wrong strength acid, there is a wide range of possibilities that could have gone wrong. Improvements: I think the method we followed was in depth and correct. We followed the method that was given to us, so maybe that's why we got no anomalies. I think if we had more time to prepare I would make sure all the marble chip was of the exact weight, and the same size. We had to roughly measure their weight on innacurate scales, it was difficult as it was only sensitive to one gram. Further work: Once again, if I had more time to complete the exercise I would collect more results. This would provide more evidence and either strenghten my predictions or go against them. As my predictions were all met with five results, I don't think doing it again would prove them wrong. But if I make more sensible predictions I could do it again and see whether they are correct, or if incorrect, why? Also to complete it more accurately I could use a wider variety of acids. This way I could complete the exercise with more acids, giving me more varied results, better conclusions and accurate results. Name: George Edwards ...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

    Rate of Reaction Chemistry Coursework

    4 star(s)

    However to make these results more reliable we would have needed to do a full repeat of the results. This would have made the data that we collected a lot more reliable making our conclusion a lot more reliable. We did perform a repeat at 40�C because we saw that

  2. Free essay

    Close Your Eyes

    I placed them in her hand and she smiled. "Thanks" I nodded and felt my stomach rumble. I was starving. I looked at the cereal we had, coco pops, coco rocks and more coco pops. I guess I'll have coco pops then. I grabbed the box, poured some into a bowl, splashed the milk onto it and walked towards the dining room with it.

  1. Investigating making Epsom salts by varying the rates of reaction.

    We decided to used 0.2g for the preliminary testing and see what happens from there. So when we had all the little elements ready we had to fill the plastic measuring cylinder up with water and carefully place it upside down in the tub full of water upside down, being

  2. Science Coursework

    I drew a line of best fit, which was an curve it went from top of the graph to the bottom. There were some points, which were not touching the line of best fit. The graph shows that the higher the concentration the less times for the cross to disappear.

  1. Surface Area and Rates of Reaction Between Mable Chips and Hydrochloric Acid

    An increase in rate of collision causes an equal increase in the rate of reaction. This is based on the collision theory that states that for a reaction to occur between two particles, 1an effective collision must take place to form product molecules.

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

    All other factors I will keep constant. Independent Variable Concentration of Hydrochloric Acid Dependant Variable Rate of Reaction Constant Temperature of acid Amount of acid Surface area and amount of Marble Chips (Calcium Carbonate) I intend to have 6 different concentrations of Hydrochloric Acid of the following molarities: 2M 1.6M

  1. Investigation of some of the factors affecting rates of reaction.

    A preliminary test will be carried out to determine whether this is required. Otherwise it would be very difficult to control this variable. * The actual conical flask used. As the experiment is based on the visibility of a cross through the glass and the solution, then the same thickness and quality of glass must be used.

  2. Investigating Rates of Reactions

    average amount of gas produced was calculated using only the second and third runs. I found out that as the concentration of acid increased, the change in temperature also increased. This was due to the fact that as we increase the concentration, the kinetic theory suggests that it will also

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