Pressure and Stoichiometry

Learning Objectives:

Students use the concepts of the limiting reagent and Boyle’s Law to write a balanced chemical equation for a reaction.


Students place a known quantity of sodium bicarbonate into a flask, dissolve it in water, and then add hydrochloric acid, which acts as the limiting reagent. They measure the changes in pressure and temperature inside the flask. After taking into account the volume of air initially trapped in the closed flask, students determine the moles of carbon dioxide produced by the reaction and write a balanced equation for the reaction.