Chemistry planning and designing lab

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Topic: The reactivity series

Problem: Which of the following metals are more reactive with acids – magnesium, zinc, aluminum, iron, lead, and copper?

Hypothesis: Aluminum is the most reactive with acids because it occurs in group III.

Aim: To perform a comparative test on which metal is the most reactive with acids.

Experiment: A comparative test is done using time to find which metal has the fastest reaction

Skill: P & D

Apparatus : Equipment: 1. 6 beakers
2. Water
3. Measuring cylinder
4. Watch or Clock

Materials: 1. Aluminum foil
2.Copper coin
3.Lead pellets
4.Zinc from a battery
5. Magnesium from Antacid
6. Iron Shavings

Reagents: 1. HCl

Procedure: 1 Rinse the containers with distilled water.

2. Pour 25cm3 of HCl in each beaker by use of measuring cylinder.

3.Insert each of the different sample metals into a beaker one at a time.

4.Observe and record the amount of time before the reaction stops with clock.

5. Make a table of your observations.

6. Setup a control using water as the reagent.

Variables: Independent: Aluminum foil, Copper coin, lead pellets, Zinc from a battery,     
Magnesium from Antacid, and Iron Shavings.
Dependent: Reaction Time

Controlled: HCl

Control: This is an identical experiment using water as your reagent.

Data: The reaction time for the different metals , to show which is the most reactive in acids.
Metals     Reaction Time/seconds in acids.

Prediction: Aluminum will be the most reactive because it is in group 3 which has the least amount of electrons to loose.

Results: The results for reaction time of the different metals, to show which is the most reactive in acids.

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"Chemistry planning and designing lab." 24 Jun 2017
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No results were obtained from the control for there was no reaction.

Metals     Reaction Time/seconds in acids.
Magnesium     10
Aluminum     15
Zinc     30
Iron     20
Copper     27

Limitations: 1.Clock and equipment may not have been used properly.

Assumption: Aluminum is not the most reactive with acids, in order of the most reactive to the least reactive they are: Magnesium, Aluminum, Iron, Copper, Zinc.

Conclusion: The most reactive metal was found to be Magnesium and not Aluminuim.

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