You are given five iron nails. Each nail is kept in a test tube containing the liquids mentioned below. Explain what happens to the iron nail in each case.
1- Salt water
2- kerosene
3- Vaseline
4- apple juice
5- hot water
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Explanation:
*salt water
Fe + NaCl ------ no reaction (Fe is less reactive)
*kerosene
no reaction
* vaseline
no reaction.but acts as barrier from corrosion
*apple juice
Fe + folic acid ------ no reaction
* hot water
Fe + H2O -------- Fe3O4 + H2
3Fe + 4H2O ----- Fe3O4 + 4 H2
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