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Acid Rain Investigation

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Introduction

Acid Rain Investigation Background information: o There are many different kinds of erosion but acid rain or else wind erosion are the two main types which could have eroded the marble statue which was positioned in the garden close to the industrial site. o Acid rain is made up from of a cocktail of different acids e.g. sulphuric acid, nitric acid, carbonic acid. Sulphuric acid is released into the atmosphere from the burning of fossil fuels like coal and oil, nitric acid is given off from car exhaust fumes, These gases react with water vapour and oxygen from the atmosphere and with the help of sunlight turn to acids and fall to ground in the forms of precipitation with high acidity levels which are between pH 1.5 and 5 (acid rain or acid snow). o Sulphur dioxide is harmful to humans and can led to bronchitis and other lung diseases. o Sulphur is released into the atmosphere through burning fossil fuels; most of the world's air pollution is due to the smoke given off from burning things. ...read more.

Middle

With the results I gain from this experiment I will draw up a graph to show how the concentration has taken effect. Safety: Like all experiments safety is very important and everything should be done carefully, safety goggles should be worn at all times in this experiment, we are using acids which are very strong, especially nitric acid, and therefore can easily burn so extra care is needed. All rules for experiments should be fallowed, to prevent any unwanted accidents, e.g. chairs below tables, tie tucked in. Fair test: To make this experiment fair a number of things must remain the same through-out the investigation: 1. same volume of acid used through-out, will be 25cm3. 2. Same type of acid used in the testing, in this experiment it will be nitric acid which I will use. 3. Every investigation must be done in the same temperature, this will be room temperature. 4. Same weight of marble used which will be measured to two decimal places. 5. So my results are correct I will do each experiment twice and find the average from the two tries. ...read more.

Conclusion

Independent-this is what will be changed through-out the experiment, I will change the concentration of the acid for each part of the investigation. Dependent- I will measure the length of time it takes for each concentration of acid to erode the marble pieces. This will be done using a stop clock. Prediction: I think that if the concentration of the acid is increased the speed of the reaction will increase, this is because with a small concentration of acid mixed with marble there is less acid particles to react with the marble meaning there are fewer successful collisions, with a much larger concentration of acid mixed with marble more collisions will take place because there are more acid particles which means that the reaction will take less time. Suitable range of readings: I will have to collect enough readings from my experiment to draw a graph, this means I will need more than 5 readings, so If I record a reading every minute I should have enough information. I will do each experiment two times and take the average results. From this I will draw a graph to show the concentration of acid against time taken. ...read more.

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