Reactivity lab:
Aim: To rank the reactivity of 5 metals (iron, magnesium, copper, aluminum and zinc)
Variables table:


What?
How?
Independent variable
· Metal
· Copper
· Zinc
· Aluminum
· Iron
· Magnesium

Dependent variable
· Reactivity
· The way it reacts to the acid
Controlled variables
· Amount of metal [powder]
· Amount of acid
· Type of metal

· By the scale (0.7 grams)
· Measure 5 ml (Graduated cylinder)
· Powder


Hypothesis: If we put 5 metals in the hydrochloric acid then Zinc will be the most reactive metal and magnesium will be the least reactive one because zinc has the most electrons then the other 4 metals which it’s more reactive and magnesium has the least electrons then the other metals which make it less reactive.

Equipment:
· Zinc (0.7 grams)
· Magnesium (0.7 grams)
· Aluminum (0.7 grams)
· Copper (0.7 grams)
· Iron (0.7 grams)
· Camera
· 5 test tubes
· 5 balloons
· Acid (5 ml each = 5 x 5)
· Scale


Method:
1. Get all the materials that are needed for the experiment - Safety coat, safety glasses, Equipment
2. Then put the cover lid on the scale and make sure press zero when the cover lid is on the scale.
3. Then measure the one metal at a time and make sure it's 0.7grams
4. Repeat step 2-3 with 4 other metals.
5. Get the acid and pour it in the beaker.
6. Put 5ml into 5 test tubes each.
7. Put the 5 metals into each test tube that through a funnel (5 funnel for each test tube).
8. Put the balloon on top of the test tube after putting the 5 metals in the acid.
9. Observe and make quantitative observation.


Diagram:

Aluminum
Capture.JPG

Magnesium:

a.JPG


Iron:

fe.JPG


Copper:


cu.JPG
Zinc:

zn.JPG
5 test tubes and a test tube holder:

test_tube.JPG
Graduated cylinder:
cynlinder.JPG
Acid:

acid.JPG


Observations table:
[Observations and ranking of the 5 metals (zinc, magnesium, iron, copper, aluminum) reacting with acid]
Metal
Observations
Ranking
Zinc
· Makes some bubbles
· Most of them are on the bottom and a little bit of them are on the top
· Has no air in the balloon

2
Magnesium
· Makes a lot of bubbles
· On the bottom of the test tube
· Has a little bit of air in the balloon

1
Iron
· Makes some bubbles (more than zinc)
· On the bottom of the test tube
· Has some air in the balloon

3
Copper
· Some on the top and some on the bottom
· Has some air in the balloon
· Make big bubbles and copper was covering that

4
Aluminum
· Not dissolving in the acid
· On top of the acid
· Has a little tiny bit of air in the balloon

5

Conclusion:
a. Answer the aim / summaries the data
After doing the experiment and looking at the result from the observation table of the reactivity of metals, the ranking was from Magnesium, Zinc, Iron, Copper and Aluminum.
b. Do the results support the hypothesis?
After doing the doing the experiment, the result showed that Magnesium was the most reactive but in our hypothesis it wasn’t magnesium but
instead it was zinc. The result did not support the hypothesis because it was magnesium instead of zinc.
c. compare to this with other scienctists'

The author reason for result was that because of their tendency to form ions. The more reactive metal it is, the more likely it is to from ions and force out. Therefore magnesium is more reactive as it forms a compound more quickly and stronger which displaces zinc during a displacement reaction. for example when u burn MG and ZN in air they both are fighting for the OXIDE to make an oxide compound (either zinc oxide or magnesium oxide) as the magnesium is more reactive and higher in the reactivity series it overpowers the zinc and displaces it to form a compound with the oxide which is called Magnesium oxide leaving the zinc on its own. Compare this result with the our result is the same because Magnesium is furthest from the stable group and it’s got less electrons in then the other metals in the shells so there more chances of it reacting then the other metals.
d. Explain the data scientific

Magnesium is the most reactive and the result for this is because magnesium has some properties that make it reactive. Another the reason for this is that Magnesium is the furthest from left to right and Magnesium is a metal this is furthest away from group 8 which it can become stable and if it the furthest out of the 5 metals from group 8 then there is a lot chances that I could react very quickly because it’s not close to group 8. The reasons for aluminum to have such slow reactions because it’s the closest to group 8 and it’s have more electrons that could make is holding on to it on the last shell so there won’t be a lot of reactions to it.

"The more reactive a metal is, the more likely it is to from ions and force others out" (unknown author).
The metal is more reactive than the other metals because of the ions it and make and because the amount of electrons in the outer shell, because it's far from being stable so it could react right away.


Evaluation:
a. Comment on how reliable this data is
I don’t think this is reliable for our experiment, because our observations are different from others’. We put balloons on top of each test tube and others’ magnesium balloons were full of air, but ours only had little bit of air inside the balloon. We think that maybe the balloon has a hole on it.
There is another reason that I think this data is not reliable, because we didn’t put metals in the acid in the same time. Maybe the time those metals to react in the acid are different.

b. Comment on how valid the method was
I don’t think our method was valid, because our method doesn’t explain clearly what to do. We had to change our method.
c. Weaknesses and improvements
Weaknesses

Improvements

Balloons didn’t fill up with air. We think that there is a hole in the balloon.

Check before put the balloon on the test tube. Blow up the balloon and see if it fills up with air.

We shook some of the test tubes to see the marks (which is which), and to see what’s happening we took the test tube up.

Maybe put the marking tape on the top of the test tube so that it doesn’t hide behind the test tube holder and instead of taking one test tube up; hold the test tube holder up.

We re-used the funnels, there might be metals mixing.

Only use one funnel for one metal; make 5 funnels.


d. What made this a fair test?
This wasn’t a fair test. There are few reasons for it. First, we didn’t put the metals in the acid in the same time, which we have to. Since we didn’t put the metals in the same time, the one later that we put in might be faster in reacting with the acid, but since it was put in later, it might react later than the other one which is actually reacting slower.
Also, we didn’t use 5 funnels, we re-used the funnels. Therefore, some of the metal (powder) mixed with other; therefore it didn’t or did react the way it does normally.


Real life application:
a. AOI
I think this relates to Approaches to Learning, because it is about collaborating, communicating and working well as a team. It is also about using information, reflecting, thinking and connecting ideas. As we are doing this lab, we did all of those 6 things. We also had to finds some weaknesses and improvements.
b. RLA
People who are building statues, they would use aluminum than magnesium. That is because aluminum doesn’t mix or react with acid. In the real life, there might be some acid rain, then the statue with aluminum built and magnesium built would have different results. Aluminum built statue would be just fine but magnesium built statue would be ruined.


Work Cited:
"Why is Magnesium more reactive than Zinc?" Yahoo Answer. Yahoo, n.d. Web. 17
Dec. 2009. <http://answers.yahoo.com/question/
index?qid=20081029091951AAzPaGi>.