HSC Together > Year12 > Qualitative Investigations to Test for the Presence of Ions (Flame tests, Precipitation, and Complexation Reactions)

Chemistry

Qualitative Investigations to Test for the Presence of Ions (Flame tests, Precipitation, and Complexation Reactions)

This is part of the HSC Chemistry course under the topic of Analysis of Inorganic Substances.

In this post, we conduct qualitative investigations, using flame tests, precipitation and complexation reactions as appropriate, to test for the presence in aqueous solutions of the following ions:

  • Cations: barium (Ba2+), calcium (Ca2+), magnesium (Mg2+), lead(II) (Pb2+), silver ion (Ag+), copper(II) (Cu2+), iron(II) (Fe2+), iron(III) (Fe3+)
  • Anions: chloride (Cl–), bromide (Br–), iodide (I–), hydroxide (OH–), acetate (CH3COO–), carbonate (CO32–), sulfate (SO42–), phosphate (PO43–)

 

Testing for Cations

The qualitative investigation, flame test, to test for the presence of cations in aqueous solution.

 

Using qualitative investigations, flame test, precipitation and complexation reaction, to test for the presence of cations in aqueous solution.

 

Testing for Anions

Using qualitative investigations, lime water tests, precipitation, and complexation reactions, to test for the presence of anions in aqueous solution.

 

Testing for Halogens

Using qualitative investigations, precipitation, and complexation reactions, to test for the presence of chlorides, bromides and iodides in aqueous solution.