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AS Chemistry Question MCQ

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ghl23:
and to answer your question.. it forms the amine group(NH2-) which then reacts with the silver ions :-X

kratos009:
Oh right i get it, thanks a lot.

123:

--- Quote from: kratos009 on November 19, 2009, 07:57:10 am ---Thanks a lot 123,  i understand it now.
If you have Chem exam tomorrow, GOOD LUCK.

Oh i just got one more question,

1.How does ammonia behave when its aqueous solution is used to dissolve silver chloride, AgCl ?

A as a base
B as a ligand with the Ag+ ion
C as a ligand with the Cl– ion
D as a reducing agent

the answer was B. I was wondering how does ammonia bind with the positive Ag+ ion, i thought it would bind with the negatively charged chloride ion as an ammonium chloride?thanks

--- End quote ---
Even i thought it binds with -ve charged chloride ion as an ammonium chloride  :-\
But it turns out that when the ppt. of AgCl dissolves in NH3 (aq) the silver ion forms a complex ion (
This line is there in the CIE txtbook (pg. 240). Dunno if ur doing A2 levels but the detail involve complex ions & solubility product (A2 level stuff!!). This site explains it well: http://www.chemguide.co.uk/inorganic/group7/testing.html#top
Man the CIE txtbook is really confusing!! Some stuff is not explained and they ask that stuff  in a AS level paper1!!

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