Stoichiometry 1

Objectives

• Show knowledge and understanding of the concepts of relative atomic mass, relative molecular mass, the Avogadro constant (L) and moles
• Use the formula moles = mass / Mr to calculate reacting masses of reactants and masses of products formed from numbers of moles (and vice versa)
• Balance chemical and ionic equations and find the empirical formulae of substances from their relative molecular masses and molar ratios
• Investigate stoichiometric ratios

Theory Presentations/Assessment - Stoichiometry 1

• Chemical Equations
• Atomic and Molecular Mass
• The Avogadro Constant
• Moles
• Calculating Molar Mass
• Empirical and Molecular Formulae
• Balancing Equations
• Calculating Reacting Masses
• Summary

Activity - Stoichiometric Ratio: Displacement between Iron and Copper (II) Sulfate

• Students use the chemistry set and a number of chemicals to establish which of two alternative equations is correct for the reaction between iron powder and copper (II) sulfate solution.

Activity - Stoichiometric Ratio: Decomposition of Sodium Hydrogen Carbonate

• Students use the chemistry set to determine the ration of reactants to products in the decomposition reaction of sodium hydrogen carbonate in the presence of direct heat.