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Aim:
To see which metal is more reactive than which metal within 5 metals given (iron, aluminium, copper, magnesium, and zinc).

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Variables:


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Hypothesis:


If we are to analyze which metal is more reactive within the five metals iron, aluminium, copper, magnesium, and zinc, then we would know that aluminium and magnesium are less reactive than copper, zinc and iron because these two elements have fewer energy levels which make them having fewer levels to jump to.

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Equipments:
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Method:

1. Gut on your lab coat and goggles for safty and you should not play around with the metal powder.
2. Get all the equipmeants that you need.
3. Measure the amount of metals (Iron, Aluminium,Copper, Zinc,Magnesium) needed for each of the test tubes (0.5gr each)
4.
Fill each of the five test tubes with 5ml of hydrochloric acids. You should be careful about the acid as it is harmful for you if you have it on your skin for a long time.
5. Label the test tubes carefully to identify which metal is which.
6. For each of the 5 metals put the 0.5 grams of their powder form. Again, you should pay attention to safety and fill them in carefully. Try not to spill too much out.5. Put a small balloon over the test tube filled with acid and metal. Try to do it as fair as possible (in other words, try and put them right after the metals are put in to absorb any gas that is reacting)
7. Observe the changes happening to the metals. Tie a string around each balloon and measure the lengths. Record qualitative and quantitative observation.



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Diagram:

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VIDEOS: 1. 5 Metals (beginning)2. Reaction of iron 3. Bubbles coming from each test tube 4. Magnesium gas 5. Reaction of magnesium 6. Reaction of iron, aluminium and copper



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Observations:


The reactivity of iron, aluminium, copper, zinc and magnesium tested with hydrochloric acid

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Conclusion:

1. The reactivity rank of the five metals (iron, aluminium, magnesium, zinc, and copper) in highest to lowest is: magnesium, zinc, iron, aluminium, copper.
2. No. The hypothesis and the results conflict each other. In our result magnesium was ranked as the most reactive but in our hypothesis we guessed that it would be less than the reactivity of iron and copper which were the two least reactive metals.
3. According to The Periodic Table of Elements (Science Education at Jefferson Lab), metals that are reactive must not be ions (no full outer shells) and the easier the element could bond to another element the more reactive they are. This is right, because magnesium only has 2 outer electrons which can give to other elements easily. From what we learn from Mrs. Law (UNIS Hanoi Science Teacher), we know that the further the outer electrons are from the nucleus the more reactive they are. From the lab, we proved this is true because Zinc was very reactive because it is further down in the periodic table.
4. Out of the five metals tested, magnesium was the most reactive. In the periodic table, magnesium is in the second column, third row. This proves that magnesium has only 2 outer electrons, and the electron is long way from the nucleus (third row = three rings). They are partly separated from the nucleus by the inner electrons, which make them more likely to be attracted to another atom (Reactivity of Magnesium). Zinc’s reactivity, on the other hand, is fairly equal to magnesium because its electrons are far away from the nucleus and is nobler; therefore it is more reactive than copper which has less outer electrons. On the other hand, aluminium is more reactive than copper because it easily forms ionic bonds (has more outer electrons) and copper atoms are quite neutral as with most transition metals (Guess8099) To conclude, the amount of outer electrons, how far they are away from the nucleus and what kind of metal they are will define if they are reactive or not (as experimented).



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Evaluation:

1. The data we got was not quite reliable, because we didn’t measure it accurately and repeatedly. And so next time we should repeat tests the data to make it more reliable.
2. The test method we wrote was easy for me and other people to follow it. Which means when we follow the method then it would make it easier for us to collect our data. When we were doing the test we found out we had some problem and weakness that we needed to improve.
3. Weakness & Improvements
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1. Some of the things that made the test fair were that it had the same amount of acid and some metal powder. We took good observation, and we only changed one variable that was the metal.

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Works Cited:
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Subject Author Replies Views Last Message
Thoughts on your wiki Andrea_Law Andrea_Law 0 53 Dec 16, 2009 by Andrea_Law Andrea_Law
Ammar. Reply. mkchi mkchi 2 63 Dec 9, 2009 by mkchi mkchi


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