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Detailed information about the equation 2Hg(SCN)2 -> 2HgS + 2SCN + 2O2 ->
This equation describes the decomposition of the chemical compound Mercury(II) Thiocyanate (Hg(SCN)2). When heated, it decomposes to create Mercury(II) sulfide (HgS), Cyanogen (SCN)2, and Oxygen (O2). -
Reaction Conditions
This reaction occurs when 2Hg(SCN)2 is heated. -
Reaction Process
When heated, 2Hg(SCN)2 decomposes to create 2HgS, 2SCN, and 2O2. This reaction can be described as follows:
2Hg(SCN)2 -> 2HgS + 2SCN + 2O2 ->
- Observed Phenomenon
When this reaction takes place, we would observe a unique phenomenon known as the “Pharaoh’s Serpent”. When 2Hg(SCN)2 is heated, it decomposes and creates a large solid mass of brownish-black substance containing HgS. The other gases are released causing the solid mass to expand and elongate, creating an image resembling a serpent “hatching” from the reaction bowl.