Beyond Benign

High School

CUR HS Stoichiometry

Stoichiometry

Empirical Formula

This lab replaces traditional labs that use the synthesis of magnesium oxide or the decomposition of silver oxide with a greener reaction using iron filings. By using 3% hydrogen peroxide and leaving the experiment for 3-4 days students can calculate the empirical formula of the rust.

Stoichiometry Challenge

This lab replaces a traditional aluminum to alum stoichiometry lab with a greener precipitation reaction of sodium carbonate and calcium chloride. It is used to demonstrate how stoichiometry works, showing that if concentrations and amounts of the starting materials are known that the theoretical yield can be calculated from a balanced chemical equation.