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3. Aqua regia, a mixture of HCl and HNO3, has been used since alchemical times to dissolve many metals, including gold.
Posted: Wed May 25, 2022 6:59 am
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- 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 19 times
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.)