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Minor Versionm

by Procheta Mallik


Different metals have different reactivity. Here, we perform a simple experiment with 3 metals to see how their reactivities compare.

    • Avoid skin contact with the chemicals

    • Do not ingest any of the materials

    • Care should be taken while doing the experiment

    • Use the scissor/cutter with care

  1. Take out given bottle containing copper sulphate (CuSO4) crystals.
    • Take out given bottle containing copper sulphate (CuSO4) crystals.

    • Fill the container with water

    • Tightly seal the cap and shake well till the CuSO4 crystals dissolve

    • In a test tube, add 10 ml of copper sulphate solution.

    • Add the given iron filings to it.

    • Leave it for some time and observe the colour change .

    • Take a plastic bottle , cut it in half using a cutter/scissor .

    • Place the upper half of the bottle inverted onto the lower part without the cap.

    • Place a filter paper on the upper part of bottle.

    • Transfer the solution containing iron filings and copper sulphate solution through the filter paper.

    • Observe what is left as residue on the filter paper .

    • Re-collect the filtrate in the test tube and observe its colour. Make a note/photo of it.

    • Clean out the test tube with water and once again, pour 10 ml of copper sulphate in it.

    • Cut the given magnesium ribbon into very small pieces using scissors.

    • Add these Mg pieces to the CuSO4 solution in the test tube

    • Observe what happens. Leave it for some time, even an hour if you can.

    • You should clearly be able to see brown-ish particles depositing on the bottom of the test tube

    • Filter the solution through a new filter paper, as shown in image .

    • Observe what is left as a residue on the filter paper.

    • Observe the filtrate in the test tube. Take a note/photo of the colour

    • Compare the colour of all three solutions.

    • Cut the magnesium into as small pieces as possible for maximum effect

    • CuSO4 solution is too concentrated to see a noticeable colour change

    • Experiment not undertaken over sufficient time; let the Fe/Mg be in the blue solution for at least 15-20 min.

    • What colour does the CuSO4 solution change to when you add iron filings? Can you think why?

    • What colour change do you observe in the case of Mg? What do you think is happening?

    • What is the brownish powder that seems to deposit on the iron filings and magnesium ribbon after filtration?

    • Write down all the chemical reactions, even in words, involved.

Finish Line

Vishal Bhatt

Member since: 04/26/2017

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