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JAMB Chemistry 1997 Question 36

Question 36

Metals and their Compounds

The removal of rust from iron by treatment with tetraoxosulphate (VI) acid is based on the

  1. A.hydrolysis of the iron
  2. B.reaction of acid with base
  3. C.oxidation of the rust
  4. D.dehydration of the iron.
Show the answer and explanation

Answer: B (reaction of acid with base)

Explanation

Rust is hydrated iron(III) oxide, a basic oxide. It reacts with the acid to form a salt and water, which is a neutralization (acid + base) reaction.