The mass would be measured Essay Example for Free

The mass would be measured Essay Introduction: Magnesium is a metal which need get rid of two electrons; oxygen is a gas at room temperature and it needs two electrons and magnesium oxide is ionic compound because when they join up they are ions and both elements have an opposite charge which creates electrostatic attraction between them creating a very strong bond between the two ions, but they only become ions when oxygen takes electrons away from magnesium. 2Mg(s) + O2 (g) 2MgO(s). The conservation of mass is also involved in this experiment so the theory of conservation of mass is that if I use 48g of magnesium and 32g of oxygen I would get 80g of magnesium oxide, and with this reaction the ratio for mass is 24:16. What I would expect the formula to be is MgO because magnesium needs to lose 2 electrons and oxygen needs to gain 2 electrons so the ratio would be 1:1 so that in every 1million magnesium atoms there would be 1 million oxygen atoms. Preliminary Work: We would be using a total mass of 150cm, we initially have 200cm but encase of mistakes we would only be using 150cm. Since there would be two experiments I would need to divide the amount of magnesium I have in two so each experiment would be using 75g of magnesium. So this means that the lengths would need to go up in 5 (5cm, 10cm, 15cm, 20cm and 25cm). Since 5, 10, 15, 20 and 25 all add up to 75 this would be the only logical method. Using a range this big also allows me to be able to make a comparison between the lengths because the results would end up being very different. Possible Formulas for magnesium oxide Formula Mass of Magnesium (g) Mass of Oxygen (g) Mass of Magnesium Oxide (g) Point to Plot MgO. ) This table shows the plotting point for the graph. All points would be going through point zero (naturally) because if you have no magnesium then it would be impossible to get any magnesium oxide because there is no magnesium atoms more oxygen atoms to join up to make magnesium oxide. This also shows the gradient of each formula so that I can match it to my graph for the main experiment and find out what formula of magnesium oxide I have created in my experiment. Formula Ratio/ Gradient MgO 1. 67 Mg2O 1. 33 MgO2 2. 33 Mg3O2 1. 44 Mg2O3 2 Mg3O 1. 22 The purpose of this graph is so that I could compare the gradient shown on this table to my graph. When I calculate my gradient I would tell what formula of magnesium oxide I have created by seeing which gradient is the closest to my gradient. Timing for reaction The aim here was to find out how long it took for magnesium to burn. Mass (g) Time (m) Crucible + lid + magnesium 50. 76 Crucible + lid 50. 45 Magnesium 0. 31 Crucible + lid + magnesium oxide 50. 93 29. Crucible + lid + magnesium oxide 50. 96 32 Crucible + lid + magnesium oxide 50. 96 35 Crucible + lid 50. 45 Magnesium Oxide 0. 51 What I learned from this is that has the mass increases so does the time it takes for the magnesium to burn. This is because more energy is required to burn more magnesium which means more time would be need to provide it. I can also tell that after repeating to see if there was a reaction there was no longer an increase in mass which meant that there were no longer any oxygen atoms joining up with any magnesium atoms. Main experiment: List of Apparatus I have used: Bunsen Burner   Crucible and Lid   Digital Balance 0. 01g Goggles Heat Proof Mat   Magnesium Ribbon (200cm)   Pipe-clay triangle   Tongs * Tripod Safety We used the crucible and lid because it wont crack which means there would be no injury to anyone. If I was to use glass the chanced of and injury would be high. Another advantage for safety with the crucible is that we wont be able to see the light produced from the creation which means there would be no risk of your eyes being damaged. We used a heat proof mat so that the table will not get burnt or anything else. We would also use goggles because at some point during the experiment we would be lifting the lid to see if the reaction has stopped so using the goggles causes a decrease in glare from the light and it was also used to prevent any particulates from entering my eyes. I also tucked in my tie in my shirt because there was fire from the Bunsen burner and I did not want to get anything easily loose on me to catch fire so tucking my tie in would lower the chances of injury to me. We also checked the heat of the crucible and lid to if it was cool enough to hold by using the harmless method; we hovered our hands over the crucible and lid to see if any heat was radiating to our hands and we could not feel any feat we would light touch the crucible for half a second to get a better sense of the heat and if it feels cool we would then take it back. Method What Im going to measure is the mass of the magnesium ribbons at different lengths, and Im also going to measure the amount of magnesium oxide it makes. The mass would be measured by a digital balance (0.01g), which was very accurate way of measuring the mass because it can detect up to two decimal places. To make sure its a fair test we took two tests for each length so that we could get an accurate average. We also used a pipe-clay triangle so that the crucible would not experience heat loss (if we were using a gauze) which would affect how much magnesium oxide is produced. We also used the ruler to make sure that the lengths that we used were as accurate as it can be so that the results are fair. How we set up the equipment was that we could have the meat proof mat so that there are no burns around the area or the possibility of fire. The crucible and lid would be placed above the pipe-clay triangle so that the heat would reach the crucible in the right place. The tripod would be used to keep the crucible and lid above the Bunsen burner at the right distance. We would also lift the lid from time to time to see if the reaction has stopped. We can tell if the reaction has stopped because there would be no bright light. Then we would reheat it to see if the reaction has fully stopped. We can tell if the reaction has fully stopped because there would be no increase in mass. Next time I would do two experiments at the same time so that I could get my results quicker. DIAGRAM: Length Crucible + lid (g) Crucible + lid + Magnesium (g) Magnesium (g) Average Magnesium (g) Crucible + lid + Magnesium Oxide (g) Magnesium Oxide (g) Average Magnesium Oxide (g) 5cm 4This table shows two results from each length showing the mass of magnesium and the mass of magnesium oxide produced. The two sets of results from each length were then turned to an average so that we can get an accurate figure. I then plotted a graph of these results so that I can see a clear trend. The reason why I took many readings from different lengths is because so that I could get different readings for mass so that I can plot them on the graph at different points so that it can give me a line of best fit.