• 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
  10. 10
    10
  11. 11
    11

What factors affect the rate of decay of a limestone castle?

Extracts from this document...

Introduction

PLANNING Question What factors affect the rate of decay of a limestone castle? A local town has a castle. The castle is built from Limestone (Calcium Carbonate). The castle has started to crumble. Some people have blamed the new damage on acid rain and have stated that the damage has increased as pollution has increased. Others blame Global warming and claim that the level of acid in the rain has stayed the same. Choose ONE factor to investigate to find the reason for the decay of the castle. The reaction is: Calcium Carbonate + Nitric Acid --------> Calcium Nitrate + Water + Carbon Dioxide Intro * I decided to investigate the affect that acid rain would have on the limestone, which the castle is built of. * For this, I decided to do an experiment involving immersing limestone chips in different concentrations of acid. Hypothesis I think that the acid will dissolve the marble chips in the experiment that I am about to perform. As I change the independant variable, the rate at which the marble chips dissolve and how much they do in the given time will vary. ...read more.

Middle

Therefore, I will be performing the task 5 times to make one single "experiment", which there are three of in this investigation. The Experiments I will try and do my best to ensure as much accuracy as I possibly can throughout the components of experiments 1, 2 and 3. Repeating the experiments 3 times and comparing results ensures an accurate average, as does measuring and ensuring some variables exempt one are of the same value throughout. However, as much as I will try to do this, it is not possible for me to ensure complete and utter accuracy, and the measurements of fluids and marble chips from component to component are bound to vary mildly, which is out of my control as there is a limit to how accurate it is possible to be. OBTAINING EVIDENCE Results Tables I have drawn up some results tables, one for each of the experiments I have done, of which there are three of altogether. Within each of the three experiments are five components. EXPERIMENT 1 Component Water(cm3) Acid(cm3) Height of jar(cm) Water decreased in jar - level of CO2(cm) C.1 40 0 23 1.5 C.2 30 10 " " 2.8 C.3 20 20 " " 4.0 C.4 10 30 " " 5.0 C.5 0 40 " " 6.0 Difference(cm) ...read more.

Conclusion

Therefore, the level of water was lower to start with, which may have contributed to the amount of cm's that the water had dropped due to CO2 gas. They may also be linked to slipped standards of accuracy in my experiments, but I was almost fully sure that I performed them with my best precision. I think that to improve the standards of the experiment and to increase the accuracy, each procedure of the experiment should be followed extremely carefully. The variables that should not be changed should be kept entirely equal, such as the timing of the reaction, the weight of the marble chips, the water in the gas jar and the amount of solution. The glass slide used to keep the water in the gas jar when tipped upside down should be released carefully, and only when the gas jar reaches the beehive in the trough should it be released. To extend my investigation on the decay of the limestone castle, I could repeat the experiment many times over to achieve an even more accurate average. I could also investigate global warming harming the limestone castle, and compare the two types of experiments to see which one would be most detrimental to the limestone castle. ...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 Aqueous Chemistry 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 Aqueous Chemistry essays

  1. Find out how the concentration of nitric acid affects the rate of reaction between ...

    I will also need to control the surface area of the marble chips because if the surface area is increased, the particles have a larger area on which to collide and break bonds. Method: * Weigh out 1g of large marble chips, of similar dimensions.

  2. To investigate three factors that affect the rate of cooling a liquid and to ...

    The difference between a conductor and an insulator, which is a poor conductor of heat, is that insulators stop the heat from escaping, but conductors absorb the heat. Method Experiment 1 - Insulation This experiment is to investigate insulation and its affects on the rate of cooling a liquid.

  1. An investigation of the factors which affect the reaction of acid rain on limestone.

    Therefore they all collide more. 3. I believe that the molecules of the reactants would work more effectively and collide more, if the temperature was higher, meaning they would react more. I predict this because the higher the temperature, the more kinetic energy the molecules have.

  2. How much Iron (II) in 100 grams of Spinach Oleracea?

    18) Continue to add the Potassium Manganate (VII) (aq) drop by drop while swirling the conical flask until the pink colour persists for 30 seconds. 19) Repeat the experiment until 3 results within 0.1 of each other have been recorded. 20) Repeat the experiment using a second sample of Spinach Oleracea.

  1. An Investigation of the weathering of limestone.

    With only one or two sets of results we will not get a good average and we will not be able to tell if a result is anomalous. Prediction: I predict that the rate of reaction will be faster in the pure acid than the dilute acid.

  2. A Investigation into the Rate of Chemical Weathering of Marble

    It was also very difficult to measure accurately at such short time intervals so I am going to extend these intervals to 15 seconds. I am also going to increase the volume of solution to 60ml so that I can make a greater number of variations and obtain more accurate results.

  1. concetration of limestone

    Read the level on the burette and take this result as rough. Further titrations: Open the tap on the burette and let out less solution which you got for the rough or previous titrations. Then open and close the tap to let one drop out at a time while gently

  2. How Does Changing The Temperature Of Acid Affect The Rate That Limestone Reacts.

    experiment a third time till I have a range lower then 10. I am going to repeat the experiment 10 times, as I am going to do five different temperatures twice, so that I get more accurate results. If the temperature of the hydrochloric acid is too cold then I

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