suggest the experiment to prove that the presence of air and water essential for corrosion?
explain the procedure
Answers
Answer:
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Answer:
Explanation:
An experiment to prove that presence of air and water is essential for corrosion is as follows-
We take a few iron nails (should be free of rust) and put them in three separate test tubes.
We label each of these test tubes- A, B, and C.
In test A, we pour tap water on the nails and then close the mouth of the test tube with a cork.
In the test tube B, we pour distilled water over the nails, then add some oil to it and close the mouth with a cork.
In the test tube C, we put anhydrous calcium chloride and close it.
We leave all the three test tubes as it is for a few days and then observe the changes.
Results-
In test-tube A, we will observe rust formation on the nails. The iron will react with the water and oxygen present in the air. The iron will get oxidised in the process and form rust.
No rust will be observed in the test tubes B and C.
In test-tube B, we added distilled water which was devoid of any other ions or acids. We also added oil. The oil will form an insulating layer between the water and the air. Thus, no reaction will occur on the iron nail surface and thus no rusting will be observed.
In test-tube C, the anhydrous calcium chloride will absorb all moisture and thus no reaction will take place.
Conclusion-
Water and air are very essential for the process of corrosion.