Answer to Question #131803 in Inorganic Chemistry for Inayatullah

Question #131803
What are qualitative measures used to find Cu in given sample??
1
Expert's answer
2020-09-06T15:02:00-0400

Cu is precipitated quantitatively as copper (I) thiocyanate from slightly acid solution in the presence of sulfurous acid using a solution of ammonium thiocyanate as reagent.


2Cu2+ + SO32- + H2O → 2Cu+ + SO42- + 2H+


Cu+ + CNS- → CuCNS(pres.)


Qualitative measure will be the formation of CuCNS precipitate.




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