Acids, Bases, and Buffers 1: Monoprotic and Polyprotic Acids Overview Getting Started Techniques Procedure FAQ Full Lab Manual Introduction & Goals Chemistry & Background Key Questions Prelab Problems Safety Procedure In Your Write-up Experiments Index ChemLab Home		Technique Links Burets pH Meter Titration Goals In this two-week experiment you will first explore the behavior of monoprotic and polyprotic acids. In week one, you will investigate the acid-base properties of acetic acid, CH3COOH, and phosphoric acid, H3PO4. By titrating, you will examine the acid and conjugate base species present across the pH scale and the composition of buffers at different pH's. In week 2 of this experiment, you will use your knowledge and skills to identify unknown solutions as acids, bases, or buffers and determine their identity from their pKa, pKb or pH values. Key Questions How do you expect pH to change with added titrant? What chemical species are present at what pH? What is the buffer region? How does a buffer work? Which equilibrium is most important in each pH region?
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