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.
A titration curve has a distinctive shape that often catches students by surprise. The shape of this curve changes predictably when weak acids are substituted for strong acids. Other parameters can also cause it to change. Once you have an understanding of the fundamental shape, a great deal of information can be derived from a titration curve.
What factors influence the shape of a titration curve?
Students will manipulate the shape of titration curves.
The student can design, and/or interpret data from an experiment that uses titration to determine the concentration of an analyte in a solution. The student can reason about the distinction between strong and weak acid solutions with similar values of pH, the concentrations needed to achieve the same pH, and the amount of base needed to reach the equivalence point in a titration. The student can interpret titration data for monoprotic or polyprotic acids involving titration of a weak or strong acid by a strong base (or a weak or strong base by a strong acid) to determine the concentration of the titrant and the pKa for a weak acid, or the pKb for a weak base.
This experiment may require software and an interface for data collection.