For the Qualitative Analysis experiment, you need to create a flow chart that clearly demonstrates
how you can identity the presence of each of the seven ions. For example, a common Chemistry 130
experiment is to separate and weigh each of the components of a mixture of sand, salt, iron filings, and
popcorn. A flow chart for such an experiment would look like the one below. Those of you who take
Organic Chemistry will create many diagrams similar to this called “Separation Schemes.”
Sand/Salt/Iron Filings/Popcorn
Step 1 – Wash mixture with water
Collect solution and
dry
Dry solids that did
not dissolve
Sand/Popcorn/Iron Filings
Salt
Step 2 – Use a sieve
Collect everything that
passes through the sieve
Collect what does not
pass through sieve
Sand/Iron Filings
Popcorn
Step 3 – Use a magnet
Collect what sticks
to the magnet
Collect what
remains
Iron Filings
Sand
Repeat the above process for the seven ions in this experiment. To help you get started, feel free to
use the following example as your first test.
Ca2+, Co2+, Cu2+, Fe3+, Mg2+, Pb2+, Zn2+
Test 1 – Chromate Test for Pb2+
Supernatant
Ca2+, Co2+, Cu2+, Fe3+, Mg2+, Zn2+
Precipitate
Pb2+