• 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

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

If it has been in contact with the eyes, seek medical attention immediately to wash out the eyes using eyewash. Substance Potassium Manganate (VII) Hazard If the solid is in contact with a combustible material this may lead to fire.

2. ## The Factors Affecting the Volume of CO2 released when a Carbonate reacts with an ...

As a result of this not all the acid could reach and react with all the carbonate, so the CO2 released was less. The acid chosen is hydrochloric acid, and this is chosen over nitric acid for no real reason - both acids behave in a similar way.

1. ## concetration of limestone

Rough 1st 2nd 3rd 4th ... Burette Final / cm3 Readings Initial / cm3 Volume Used / cm3 Average Volume Used / cm3 Calculations The average volume used from the results is required and must be in dm3.

2. ## To investigate the factors affecting the volume of carbon dioxide produced when a carbonate ...

This reacted too quickly, so I decreased the volume of HCl. This produced a large volume of CO2, meaning that less had escaped because the speed of the reaction was reduced. I decided that the mass of CO2 was sufficient enough; therefore the volume of acid that I will use will be 25cm3.

1. ## Investigate the factors that affect the rate of reaction between limestone

Prediction: I predict that when changing the concentration of the acid, the reaction will go faster. This is because the more concentrated the acid is, the closer together the particles will be. This means that collisions will occur more often.

2. ## Investigate 'How much gas is released when a metal reacts with an acid.'

+ 32 (the mass of the sulphur) + 16 � 4 (the mass of the 02). You then work out how much you will need for a certain amount of Magnesium: 24g of Magnesium will need 98g of H2SO4 0.24g of Magnesium will need 9.8g of H2SO4, and 0.024g will need 0.098g of H2SO4.

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