- 3 Aqua Regia A Mixture Of Hcl And Hno3 Has Been Used Since Alchemical Times To Dissolve Many Metals Including Gold 1 (44.67 KiB) Viewed 18 times
3. Aqua regia, a mixture of HCl and HNO3, has been used since alchemical times to dissolve many metals, including gold.
-
answerhappygod
- Site Admin
- Posts: 899603
- Joined: Mon Aug 02, 2021 8:13 am
3. Aqua regia, a mixture of HCl and HNO3, has been used since alchemical times to dissolve many metals, including gold.
3. Aqua regia, a mixture of HCl and HNO3, has been used since alchemical times to dissolve many metals, including gold. Its orange color is due to the presence of nitrosyl chloride. Consider this one-step reaction for the formation of this compound: NO(g) + Cl₂(g) →→→ NOCI(g) + Cl(g) AH° = 83 kJ (a) Draw a reaction energy diagram, given Ea(fwd) = 86 kJ/mol. (b) Calculate Ea(rev). (c) Draw the Lewis structures of NO, Cl₂ and NOCI. Sketch a possible transition state for the reaction. (Note: The atom sequence of nitrosyl chloride is Cl-N-O.)