Teacher manual for AP* and Advanced Chemistry labs. Has both the printed version and a flash drive with teacher tips, a PDF of teacher version and editable Word student version.
In some cases we want reactions to proceed quickly, for example, for air bag deployment or certain processes used in manufacturing. In other cases, we want reactions to proceed slowly, such as the corrosion of car parts or aging. Scientists have discovered many factors, or variables, that can be manipulated to change the rate of a reaction. In this investigation, you explore one factor that may alter the rate of a reaction and share what you've found with your classmates.
How can we speed up or slow down a chemical reaction?
In this lab, students explore, through student-designed procedures, several variables that could affect the rate of a chemical reaction. The system of study is calcium carbonate and hydrochloric acid. The production of carbon dioxide will be monitored using a pressure sensor.
The student is able to design and/or interpret the results of an experiment regarding the factors (i.e. temperature, concentration, surface area) that may influence the rate of a reaction.
This experiment may require software and an interface for data collection.