This resource is a laboratory experiment meant to accompany Chemistry Atoms First 2e Chapter 14https://openstax.org/books/chemistry-atoms-first-2e/pages/14-introductionThis activity incorporates the following laboratory skills: Preparing solutions with volumetric pipetsMeasuring absorbance spectrophotometricallyMeasuring pH with a pH meterGenerating a linear graphStudents should be familiar with the following concepts: Using the dilution formula to calculate concentrationGenerating the equation of a line by linear regressionUsing the equation of a line to solve for "x" given y-valuescalculating hydronium ion concentration from pHcalculating K from equilibrium concentrationscalculating deviation, calculating % error and interpreting quality of results.