The method was to introduce sodium chloride to soil laced with lead (II) nitrate and separate the resulting white precipitate via centrifugation. The separated white precipitate, in the form of lead (II) chloride, was weighed.
The results were compared to the original amounts of lead in the soil, determining how efficient the method was. The white precipitate was proven to be lead (II) chloride after adding sodium chromate and watching the mixture turn yellow. Ultimately, it was shown that using gravimetric analysis and ion precipitation, lead ions were removed from the soil.
The results showed that gravimetric analysis was, in fact, a viable technique to remove lead from soil. With a combination of chemical reactions and centrifugation, it was possible to rid soil of toxic chemicals, specifically lead.
This project uses gravimetric analysis and ion precipitation to remove lead from soil.
Science Fair Project done By Berj Chorlian; Shaunt Kevork