Topics: Molar Mass, Balancing Reactions, and Using Stoichiometry
Through a combination of particulate-level representations and virtual lab activities, students learn how gravimetric analysis can be used to determine the concentration of various species in water. Students review precipitation reactions and use the virtual lab to find out which chemicals react to form a precipitate. Using stoichiometry to connect mass to concentration, students determine if the water is safe to drink based on EPA guidelines.
The research reported here was supported by the Institute of Education Sciences, U.S. Department of Education, through Grants R305A100069 and R305A170049 to WestEd. The opinions expressed are those of the authors and do not represent views of the Institute or the U.S. Department of Education.