Question

The Figure below shows a reaction scheme starting with copper turnings. Study it and answer the questions that follow

1. State the reagent that is added in step 1 
2. ldentify gas H 
3. Write the formula of the complex ion in solution J. 

Answer 1

1. Conc. Sulphuric(VI) acid, Conc. H₂SO₄ or Sulphuric(VI) acid
2.  SO₂ or sulphur (IV) Oxide.
3. (Cu(NH₃)₄)²⁺