Hello,
I have an experiment coming up where we will be receiving unknowns. I am in the process of drafting how to identify the ions in each tube. Each tube will have one of the listed solutions within. I need a lot of help in identifying my errors. Please read over and tell me what works and what actually does not. Please explain why not because I believe I'm confusing some of the reactions, and some of the ones I've listed actually do not dissociate or react as I'm assuming.
1. Solution contains either Ag(NO3), Cu(NO3)2, or Fe(NO3)3
-Test for Ag+ by adding HCl. Precipitate confirms Ag+
-Test for Fe3+ add KSCN, and if deep red complex ion forms, confirms ion.
2. Solution contains either HCl, HNO3, or H2SO4
-Test for H2SO4 by adding NH3 until basic, then BaCl2 solution, and formation of precipitate confirms.
-Test for HCl by adding NH3 until basic, then AgNO3, and formation of precipitate confirms HCl.
3. Solution contains a base of either NaOH, NH3, or Na2S
-Test for NaOH by getting solution of Pb2+ and adding unknown until basic and precipitation occurs. Then excess to see if complex ion develops back into aqueous.
-Test for NH3 by getting Cd2+ solution and repeat above procedure using NH3.
4. A Chloride salt solution with either NaCl, BaCl2, or CuCl2
-Test for BaCl2 by adding H2SO4 and precipitation form confirms Ba2+
-Test for NaCl by adding CrO4{2-} solution, and if solution remains clear, NaCl confirms.... or adding H2CO3 and no precipitate confirms NaCl, while white precipitate = Ba2+, and light blue precipitate = Cu2+. (Confused as to which one I should use here)
5. A Sodium salt, either NaI, Na2SO4, or Na2CO3
-Test for NaI by adding HNO3 until acidic and adding additional drops. Then add AgNO3 solution. Precipitate confirms NaI.
-Test for Na2SO4 by adding HCl and BaCl2 solutions. White precipitate confirms sulfate.
I have an experiment coming up where we will be receiving unknowns. I am in the process of drafting how to identify the ions in each tube. Each tube will have one of the listed solutions within. I need a lot of help in identifying my errors. Please read over and tell me what works and what actually does not. Please explain why not because I believe I'm confusing some of the reactions, and some of the ones I've listed actually do not dissociate or react as I'm assuming.
1. Solution contains either Ag(NO3), Cu(NO3)2, or Fe(NO3)3
-Test for Ag+ by adding HCl. Precipitate confirms Ag+
-Test for Fe3+ add KSCN, and if deep red complex ion forms, confirms ion.
2. Solution contains either HCl, HNO3, or H2SO4
-Test for H2SO4 by adding NH3 until basic, then BaCl2 solution, and formation of precipitate confirms.
-Test for HCl by adding NH3 until basic, then AgNO3, and formation of precipitate confirms HCl.
3. Solution contains a base of either NaOH, NH3, or Na2S
-Test for NaOH by getting solution of Pb2+ and adding unknown until basic and precipitation occurs. Then excess to see if complex ion develops back into aqueous.
-Test for NH3 by getting Cd2+ solution and repeat above procedure using NH3.
4. A Chloride salt solution with either NaCl, BaCl2, or CuCl2
-Test for BaCl2 by adding H2SO4 and precipitation form confirms Ba2+
-Test for NaCl by adding CrO4{2-} solution, and if solution remains clear, NaCl confirms.... or adding H2CO3 and no precipitate confirms NaCl, while white precipitate = Ba2+, and light blue precipitate = Cu2+. (Confused as to which one I should use here)
5. A Sodium salt, either NaI, Na2SO4, or Na2CO3
-Test for NaI by adding HNO3 until acidic and adding additional drops. Then add AgNO3 solution. Precipitate confirms NaI.
-Test for Na2SO4 by adding HCl and BaCl2 solutions. White precipitate confirms sulfate.