Qualitative Analysis of Anions 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		Goals This lab introduces qualitative analysis, the area of chemistry concerned with the identification of substances by their chemical reactions. You will observe the reactions of some simple salts, analyze common household chemicals, and identify an unknown sample by testing its reactivity. This experiment also provides a review of balancing chemical equations and reaction stoichiometry. To Learn or Review Writing Balanced Chemical Equations Zumdahl pp. 66-70 Ions and Ionic Compounds Zumdahl pp. 29-32, 36-39 Nature of Dissolved Species Zumdahl pp. 89-91 Net Ionic Reactions Zumdahl pp. 123-129 Balancing Redox Reactions Zumdahl pp. 123-129 Introduction Identifying samples of unknown substances is an important part of chemistry, with applications in such fields as medicine, environmental science, and geology. Materials can be characterized by their chemical reactions and by methods involving instruments. Often identification of substances by their typical reactions is easy, quick, accurate, and inexpensive, in comparison to instrumental methods. In this lab you will observe some characteristic reactions of five negatively charged ions (anions). Your observations of carbonate (CO3-2), hydrogen carbonate (HCO3-), sulfate (SO4-2), chloride (Cl-), and iodide (I-) reactions will then help you to identify an unknown sample. The Chemistry & Background page presents the chemical reactions that you will observe in the lab this week.
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