Question #fc006

2 Answers
Jul 4, 2016

Test tube 1 contains the silver and so must be #"AgNO"_3#. The silver reacts with sulfide and iodide ions to give the precipitates so you should now see what is in test tubes 2 and 3.

Jul 4, 2016

Answer:

Mix some of the silver nitrate solution with each of the other tubes to identify the iodide.......

Explanation:

Having identified the test tube containing the silver nitrate, add some of this to the contents of each of the other tubes. The one that yields a pale yellow precipitate will be the one containing the potassium iodide.

#KI (aq)# + #AgNO_3(aq)# --> #KNO_3 (aq)# + #AgI (s)#

The precipitate is silver iodide.