Uranium forms soluble sulfate and carbonate complexes; therefore, sulfuric acid [H₂SO₄ , in ~80% cases] or solutions of alkaline carbonates [NaHCO₃ , Na₂CO₃ or (NH₄)₂CO₃ ] are applied for uranium leaching from the ore (either in-situ or after mining). Explain details of leaching, if UO₂ doesnt dissolve with these complexing anions (sulfate or carbonate) without adding an oxidizing agent:

- Ferric sulfate used in combination with sulfuric acid to dissolve UO₂ , and write the equation of dissolution.

- Hydrogen peroxide can be used in combination with carbonate to dissolve UO₂, and write the equation of dissolution.