1). What solution (anion) can you add to each of the following cation mixtures to precipitate...
1). What solution (anion) can you add to each of the following cation mixtures to precipitate one cation while keeping the other cation in solution? (refer the solubility table)
a). Ba2+ (aq) and Mg2+ (aq)
b). Cu2+ (aq) and Hg22+ (aq)
c). NH4+ (aq) and Ca2+ (aq)
d). Fe2+ (aq) and Pb2+ (aq)
e). Ag+ (aq) and Zn2+ (aq)
Can someone explain to me, in simple terms, how these problems are solved?
Homework Answers
a). Ba2+ (aq) and Mg2+ (aq)
Ba + K2CrO4 --> BaCrO4(s) + 2K+
b). Cu2+ (aq) and Hg22+ (aq)
addition of HCl will preciptiate Hg2+2 and not Cu+2
Hg2+2 +2 Cl- = Hg2Cl2(s)
c). NH4+ (aq) and Ca2+ (aq)
addition of Na3PO4 will preicpitate Ca2+ + PO4-3 = Ca3(PO4)3(s)
d). Fe2+ (aq) and Pb2+ (aq)
addition of HCl will form
Pb+2 + 2Cl- = PbCl2(s)
e). Ag+ (aq) and Zn2+ (aq)
Ag+ precipitates with HCl to form
Ag+ + Cl- = AgCl(s)
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yes no PbO2
yes no No reaction
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yes no I-
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#2.If I'm asked to find the best oxidation agent, from the
values already provided (Cu+, Ag+ F2 and Fe3+) which one would it
be? and how would I decide from repeated values, like in #1,...
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