A solid unknown may contain any of the following: AgCI, Cu(OH)2, BizSs, Pb(NOs)2

Question

A solid unknown may contain any of the following: AgCI, Cu(OH)2, BizSs, Pb(NOs)2 The solid is insoluble in water but completely soluble in ammonia to give a deeply colored solution. ldentify, as completely as possible, the solids that are present. Suggest additional tests that one might use to further identify the unknown. 5. (2) AgC (2) Cu(OH)2 definitely presentdefinitely absent questionable (2) Bi2S (2) Pb(NO3)2 definitely present definitely absent questionable definitely present definitely absent questionable definitely present definitely absentquestionable (1) Additional Tests:

Explanation / Answer

Cu(OH)2 is definitely present. it is insoluble in water and soluble in ammonia giving a deeply colour of hexaammonium copper salt.

further test.: addition of iodine to the solution gives reddish brown colour

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