what is the purpose of this equation in test for sulphur Fe3++SCN-=[Fe(SCN)]2+?
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19th January 2013,
11:53 AM
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Answer:
If both N & S are present in the organic compound and Sodium extract is prepared with insufficient amount of Na metal, the thiocyanate (SCN-) is formed instead of cyanide ion (CN-).
Na + S + C + N ? NaSCN (if both N & S are present & insufficient amount of Na is used) The thiocyanate, SCN- reacts with Fe3+ to give a blood red coloration due to formation of [Fe(SCN)]2+.
Fe3+ + SCN ? [Fe(SCN)]2+
Answered by Expert
21st January 2013,
3:49 PM
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