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An Experiment to Determine the Atomic Mass of a Metal X.

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Introduction

An Experiment to Determine the Atomic Mass of a Metal X Aim The aim of this experiment is determine the atomic mass of the unknown metal X. We will do this by following the instructions laid out on the method sheet. We also hope that by determining the atomic mass and referring to the periodic table we will be able to actually to determine which element metal X actually is. Hypothesis We cannot really have a hypothesis for this experiment, but I think that it is worth saying that the metal X looks like magnesium ribbon and we might expect that metal X to will have an atomic mass of 24.3 as this is the atomic mass of magnesium. Safety Precautions As there was HCl involved in this experiment and HCl is corrosive we must be sure to wear safety goggles at all times throughout the experiment. ...read more.

Middle

These results are very surprising indeed as I thought the metal was magnesium. I still think it is though and I think I must have made some errors while carrying out the experiment or making my calculations. It is strange though that all my results were anomalous. Evaluation and Conclusion In this experiment I think that there were many errors, otherwise my results may not be so strange. Even though I have no evidence that Metal X was magnesium, I do believe it to be and magnesium has an atomic mass of 24.3. My results show very different patterns and they are far too different for me to call them reliable. I thin that the quality of my results is very poor indeed. As for anomalies, I think that all my results are anomalies, but I don't know how this came about. There are certain errors within the experiment that may partially account for the unreliable results. ...read more.

Conclusion

Errors This experiment has many errors and I some of these may be able to account for my anomalous results. Firstly some gas may be given off before I have had the time to place the cork in the flask. This would mean that I lose some volume of gas. Also the magnesium may have been impure and the oxide layer may have taken some of the mass. I also found that when I was trying to weigh my magnesium the balance was wandering and I had to pick a reading and this may not have been the most accurate. Also when the bung is pushed into the flask it may displace some air and create an error. Further Work If I was going to do further work I might use some different metals. I might also use different acid concentrations and different acids altogether. Also I might like to find the relative atomic mass of a metal using a more accurate method and achieve mor3e accurate results. I would use the method of some kind of electrolysis. ...read more.

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