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Find out which metal combination gives out the most voltage in a solution.

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Introduction

Aim To find out which metal combination gives out the most voltage in a solution. Background Metals are an order of chemical elements in the periodic table. They are arranged in atomic number. All of them are solid (apart from mercury), good thermal and electrical conductors and are shiny when polished. Metals and non - metals are separated in the table by a diagonal line. The reactivity series is a table to show which metals are most reactive to the least reactive. Potassium is known as the most reactive and platinum the least. Most reactive Potassium Sodium Lithium Calcium Magnesium Aluminium Zinc Iron Tin Lead Copper Silver Gold Potassium Least reactive Electrical flow through metals work like this: the current in the metal is carried by electrons and will only flow if there charges which can move freely. Metals contain a sea of electrons (which are negatively charged) and which flow throughout the metal. This is what allows electric current to flow so well in all metals. ...read more.

Middle

My first actual plan was to test five metals: calcium, aluminium, zinc, magnesium, and iron. I wouldn't try potassium, sodium, or lithium because I knew they would blow up, (because of previous experiments) and be no use. Firstly I would test aluminium and calcium together five times, then zinc and iron five times then swap them around and then see the results to see which combination gives out the most power. I wasn't going to test anything lower than iron because I don't think it will be worth it and it will take a long time to conduct and not give out a lot of power. Apparatus The following apparatus will be used: a beaker, hydrochloric acid, voltmeter, 2 clip wires and copper, zinc, aluminium, magnesium, lead, and tin. Diagram Prediction I think aluminium and magnesium would give out the most power because they are higher than zinc and iron in the reactivity series, therefore it would be more appropriate to use aluminium and magnesium as it would be likely to give out more power. If magnesium explodes then I think zinc would be the next choice. ...read more.

Conclusion

Even though aluminium is right behind magnesium in the reactivity series, in this experiment it looks likes it is much more behind. I think the results were accurate because it was done five times with each metal, which made it fair. Evaluation The method in which this experiment was done was ok but I think it would have been better if I got to choose how to do it and what metals to use. The quality of the results I think were considerably reasonable. But the results I got with lead was silly, it was a waste of time trying lead as it didn't give out hardly anything but if I had given it more time, then maybe it would have done better. To improve the way the experiment was done: I could have tried different acids to test the metals, use a wider range of metals to test, use a better and more reliable voltmeter, and give the metals more time to react with the solution. But this experiment was a short and simple experiment to find out which metals gave out the most voltage. Which metals give out the most voltage Gurmik Brainch 10R3 ...read more.

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