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Investigate whether temperature affects the rate of reaction between Magnesium ribbon and Sulphuric acid.

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Introduction

Plan Aim To investigate whether temperature affects the rate of reaction between Magnesium ribbon and Sulphuric acid. Key Variables These are the key factors I could change in my experiment: * The temperature of the Sulphuric acid * The length of the magnesium ribbon, surface area * The time of reaction * The concentration of the sulphuric acid * The mass of the sulphuric acid * The use of a catalyst The variable I have decided to change is the temperature of the sulphuric acid. I will do this by increasing or decreasing the temperature using ice for cooling or hot water for heating. I will control the variable of length of time by making sure each experiment is 30 seconds long, recording the amount of gas given off every 10,20 and 30 seconds. I will use the same concentrated acid each time, 1.0molar and the same length of magnesium ribbon, 8cm. The volume of the sulphuric acid will be the same each time. I will use 75ml of sulphuric acid. I wont use and catalysts to speed up the reaction. Preliminary work To test out my investigation first I did some preliminary work to make sure the apparatus I chose was the best way of making sure my experiment was accurate. ...read more.

Middle

Safety To make sure any experiment is safe I will wear goggles to protect my eyes at all times and an apron. I will wash my hands if I get acid on them. I have a string attached to the gas syringe so the end cannot fall out. I am going to have the gas syringe on a clamp so it cannot fall onto the floor. I will use a safety mat to prevent anything burning. I will clear the desk free of objects and tie my hair back. Method * Collect the following equipment: * * Conical flask, * Bunsen burner, * Safety mat, * Measuring cylinder, * Gas syringe, * Thermometer, * Clamp, * Boss, * Stand, * Stop watch, * 1 molar Sulphuric acid, * Magnesium ribbon * Ice * Set up the bunsen burner, and place a beaker 3/4 full of water on the heat. * If you need to decrease the temperature of the water, get a beaker of crushed ice. * Set up equipment like so: * Measure out 75ml sulphuric acid in the measuring cylinder, * Pour into a conical flask. * Place gas syringe horizontally onto the stand, held on by the boss and clamp. * Check the temperature of the water and get it a few degrees above or below your target temperature for the sulphuric acid. ...read more.

Conclusion

None of my results were abnormal or seemed out of place. The equipment I used I felt was the best I could use and the most accurate. It really helped me doing a preliminary experiment, as I was able to see how I could improve things. I did improve a lot of aspects of my experiment, such as the range of time and this meant I did have better results. I could have improved my experiment further by using an even larger range of temperatures and time. I could have started on 0?C and gone up to a higher temperature. This would have given me larger data, which would be better. I could also carry on my experiment, to carry out further investigations by changing some of the key variables. I could change the strength of the acid to 0.5 molar or a stronger. I could also see if changing the length of the magnesium ribbon would make any significant changes to my results. I could add a catalyst to speed up the reaction and see if it would make as bigger difference as changing the temperature did. I could have also changed the volume of Sulphuric acid. I am pleased with how this investigation went and also the results it proved. I don't think there are many things I would do differently except the ones I have written about. Anna Boast 10L Mr Williams 4 ...read more.

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