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Investigation Into How Acid Rain Affects the speed of corrosion in marble status.

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Introduction

INVESTIGATION INTO HOW ACID RAIN AFFECTS THE SPEED OF CORROSION OF MARBLE STATUS Plan In my task is to see how limestone reacts with different concentrated (strengths) Nitric acid, each experiment I plan will need to be done twice. My set up equipment needs to be safe, "I don't want my results to go wrong". Fair testing I will need to do a faire test, so that all my results will look near enough the same (will be accurate). For a faire test everything must stay the same, a part from the concentrated strength acid and water. The mass of limestone will be the same, as well as the volume of acid and water. The room temperature will also stay the same. The measurements of acid and water will be different. The volume of acid and water will be 30cm3. If I changed the strength of acid I will see how different the limestone reacts with different strengths. The volume of water and acid will be divided into half's, quarters, and full strengths. ...read more.

Middle

130 cm3 130 9 135 cm3 130 cm3 132.5 10 135 cm3 135 cm3 135 1/4 strength 65 ml acid 195 ml water Time Volume 1 Volume 2 Average 1 20 cm3 20 cm3 20 2 20 cm3 50 cm3 35 3 30 cm3 60 cm3 45 4 50 cm3 80 cm3 65 5 60 cm3 85 cm3 72.5 6 80 cm3 90 cm3 85 7 80 cm3 90 cm3 85 8 80 cm3 95 cm3 87.5 9 80 cm3 95 cm3 87.5 10 80 cm3 95 cm3 87.5 3/4 strength 19 1/2 acid 6 1/2 water Time Volume 1 Volume 2 Average 1 40 cm3 30 cm3 35 2 100 cm3 110 cm3 105 3 130 cm3 130 cm3 130 4 135 cm3 160 cm3 147.5 5 180 cm3 180 cm3 180 6 200 cm3 210 cm3 205 7 210 cm3 220 cm3 215 8 220 cm3 230 cm 225 9 230 cm3 240 cm3 235 10 240 cm3 250 cm3 130 1of 8th of acid and1of 8th of water Time Volume 1 Volume 2 Average 1 5 cm3 5 cm3 5 2 5 cm3 10 ...read more.

Conclusion

To react strong enough they have to collide hard enough Scientific Knowledge Reaction rates are explained perfectly by collision theory. Its really simple it just says that the rate of a simply depends on how often and how hard the reacting particles collide with each other. The basic ideas is that particles have to collide in order to react, and they have to collide hard enough as well. Evaluating evidence By looking at my results the more strength acid is acting with limestone gives off more gas to be collected. By looking at my graph I'm noticing that the more strength acid, starts off fast. There reaction is taking places when collision are happening the more collision taking places = the more gas collected. The reason why full strength acid is the best is because more collision are happening with the limestone so more gas is coming off (being collected). If I had to improve my results I would recorded the temperatures more accurate than I did for my other experiment. I would also record the room temperatures as it might of effected my results. I would also do all experiment on the same day so that room temperatures is same for each experiment ...read more.

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