Question

how can you prove that air and water are necessary in corrosion

Answer 1

•Through nail activity....
•Take 3 nails and 3 test tubes and name them as A,B AND C...

•NOW FILL ONE TEST TUBE WITH WATER AND PUT ONE NAIL IN IT.

•NEXT ADD ONE NAIL IN ANOTHER TEST TUBE ADD A NAIL AND FILL WITH OIL AND DISTILLED WATER.

•IN ANOTHER TEST TUBE ADD A NAIL AND PUT SOME ANHYDROUS CHLORIDE BALLS...

•AND AT LAST CLOSE ALL TEST TUBES WITH SINGLE HOLED RUBBER CORKS..

•LEAVE IT A WHILE.....(FEW DAYS)

•U WILL OBSERVE THAT NAIL IN THE TEST TUBE FILLED WITH ONLY WATER GETS RUSTED(CORROSION)..

•AND OTHER TWO NAILS IN TEST TUBES DOESN'T GET RUSTED...

•ITS BECAUSE SECOND TEST TUBE HAS OIL IN IT WHICH PREVENTS AIR TO ENTER INTO IT...

•AND OTHER TEST TUBE CONTAINS ANHYDROUS CHLORIDE BALLS WHICH PREVENTS MOISTURE...

•HENCE IT IS PROVED THAT AIR AND WATER ARE NECESSARY FOR CORROSION...

•I HOPE THIS HELPS U...MARK BRAINLIEST.

•IF IT HELPED U ONLY...THANK U...

Answer 2

•Take three test tube and name it as A B and C

•Take iron nail and clean them properly.

•In test tube A put iron nail and distilled water and close it with cork properly

•In test tube B put nail and fill warmed distilled water so that iron nail is completely immersed in water and put some oil in it which will prevent air from entering water.

•In test tube C put some anhydrous calcium chloride and iron nail and cork it. calcium chloride will absorb moisture from air .

Leave all these test tubes for a few days and then observe them.

You will observe that iron nails in test tube A’ get rusted. But they do not rusted in test tubes B’ and C.

In the test tube A’ the nails are exposed to both air and water. In the test tube ‘B’ the nails are exposed to only water and the nails in test tube ‘C’ are exposed to dry air only.

From this activity we conclude that both air and water are necessary for corrosion (Rusting) of iron.

Hope it helps!!!