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# To find out what effects the weathering of the limestone building.

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Introduction

AIM: To find out what effects the weathering of the limestone building. SAFETY: To do this experiment safely, I will ensure that my group and I will wear goggles during the experiment and do not mess around or run around the class. It will be better to stand up and not sit down and lastly I will make sure that my group do the experiment right so there will be no mistakes. FAIR TEST: The experiment will be done as a fair test, because all chunks will be the same weight. When you have to put small chunks in the tube, you will have to measure the weight and the weight was, 3 grams, so we will get the small chunks out and put it on a scale and measure it then take it out. With the medium chunks the limestone will be bigger and again we will measure 3 grams, the large chunk will be even bigger and we will measure the grams so the substances are fair. For the water, it will be right on top of the cylinder so there is no air in the cylinder and the bucket will have the same amount of water. I will make sure that when the limestone go in the conical flask I will put the lid on straight way or the gas will escape. Also that no one will shake the flask or the pipe, if you shake the flask then the reaction will be quicker. ...read more.

Middle

gas is going through the pipe and out the cylinder the air in increasing and the water is decreasing, so when it get to 15 seconds you will right down the measurement of the gas, and then when it gets to 30 seconds you will write down the measurement and then 45 seconds and so on, you don't stop the time you will carry on. Now you will do medium chunks and the gas will be different. You put the chunks in and the acid should be 30cm� and then you put the acid in, again now you will measure the gas, from 15 seconds, then 30, then 45, 60 and so on. Then you will do the large chunks this time the gases will be less, so you will measure 15 seconds first then 30 seconds an so on. Now you have to do the powder and this time it will be faster, so when you put the acid in you will have to put the lid as fast as you can and then you will measure it the results will be different and funny. You measure it at 15 seconds then30 then 40 and so on. Now you have finished the first part, you have to repeat it 3 times now do it will be a fair test and also it will be accurate. Then you have to find the average out plot a graph and a table. HYPOTHESIS: The larger the chunk the lesser the gas is produced the smaller the chunks the more the gas is produced. ...read more.

Conclusion

I know that my prediction was right because if you look at the table, I said that the powder will react faster then the rest at the start and it happened also that the chunk with the lowest gas will be the large chunks. So I expected my prediction to be right and it was. There might be more patterns or more scientific explanation on this experiment which I could not find out. My Experiment gave me some useful results because we done a fair test and every thing was done nicely and we done our experiment 4 times so it was accurate. So my results was reliable because we done it 4 times and found the average out. I have a firm conclusion and that is when there is a small chunk, then there will be lots of gas being produced and when there is a large chunk there will be less gas being produced. The experiment could be a bit better if we used 1 molar acid and 2 molar acid to find the difference. Our experiment worked well, we had no mistake because we knew what to do and we done it in a fair test. I can improve the method by adding more chunks and powder. My method says what to do in the experiment it is clear, so anyone who have not done the experiment they could use my method. There was no odd results, every thing was what I expected and my results were very reliable. I can improve this investigation by finding out information about this project and about this experiment. Like I could of found more about limestone building when it is effected with acid. ...read more.

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