Chemlab: Chemistry 3/5

Direct to Experiments

Week 1

Week 2

Week 3

Week 4

Week 5

Week 6

Week 7

Week 8

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Week 1: Qualitative Analysis of Anions
In this experiment, you will observe the reactions of some simple salts, analyze common household chemicals, and identify an unknown sample by testing its reactivity.
Week 2: Qualitative Analysis of Cations
In this experiment, you will use qualitative analysis to identify the cations in known and unknown samples. By observing the reactions of known cation samples, you will construct a logical flow chart for identifying the components of a mixture of unknown cations.
Week 3: Natural Salt Solutions 1: Ion Exchange
This week you will concentrate on understanding the chemistry of ion exchange and estimate the capacity of an ion exchange column from your observations.
Week 4: Natural Salt Solutions 2: Analysis of Seawater
This week you will use an ion exchange column to analyze a sample of natural seawater. Cations in the sample will be exchanged on a column for H+ ions. The acidic effluent solution will then be analyzed by titration with base. You will also determine the concentration of the base solution by standardizing it with the standard acid potassium hydrogen phthalate (KHP).
Week 5: Acids, Bases, and Buffers 1: Mono- and Polyprotic Acids
In this experiment you will explore the behavior of the monoprotic acid, acetic acid (CH3COOH) and the polyprotic acid, 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.
Week 6: Acids, Bases, and Buffers 2: Unknown Solutions
This week you will identify unknown solutions as acids, bases, or buffers and determine their indentity from their pKa, pKb or pH values.
Week 7: Calorimetry 1: The Enthalpy of Formation of MgO
In this experiment you will determine the standard molar enthalpy of formation of magnesium oxide, MgO, using Hess's Law and the enthalpy changes of several other solution reactions that are more easily performed and observed.
Week 8: Calorimetry 2: Hot and Cold Reactions
In this experiment you will determine the heats of reaction for an exothermic and an endothermic reaction in solution and learn what factors contribute to the spontaneity of the two reactions under study.
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