CHEM MISC ANALYTICAL CHEMISTRY I - EXAM ONE NOTES.

What is Analytical Chemistry?  Two Questions: o Qualitative Analysis: What is it? o Quantitative Analysis: How much of it is present?  Two General Approaches: o “Wet” Chemistry o Instrumental Analysis  Quantitative teaches you: o To be accurate and precise. o To consider how measurements are taken. o To identify variables in experiments. Sampling  Sampling: Obtaining a representative set of materials. o Sample Type:  Homogenous: Uniform Composition  Heterogeneous: NOT Uniform Composition Sample Preparation  Prepare a sample for chemical analysis.  For a particular procedure or method: o Understand the principle of the method. o Understand the limitations of the method.  Method: Grinding o Turns larger particles into smaller particles. o Homogenization  Method: Digestion: o Insoluble solids brought into solution. o Usually involves heat and chemicals. o Kjeldahl Method for Total Organic Nitrogen