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Lab 4B.docx

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CHEM 121
Tamara Kunz

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Lab 4B - Volumetric Analysis notes What is Volumetric Analysis????  VA is the quantitative analysis based on measuring volumes  The most common kind = a titration  A standard solution of unknown concentration is chemically reacted with an unknown concentration in order to determine the concentration of the unknown.  Measurements must have at least 4 sig figs  Preparation of a standard solution  Weigh the sample on an analytical balance by differences into a beaker.  Dissolve with a small volume of water or another solvent  Sodium Oxalate is best done with 25 mL 3M sulfuric acid and 75 mL water  Hotplate @ 2 will help. Make sure the solid is dissolved before you do anything.  Rinse the 250.0 mL volumetric flask and funnel with de-ionized water to clean the glassware  Quantitatively trans
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