Aqueous Solutions and Solution Stoichiometry

Aqueous Solutions and Solution Stoichiometry - 1 CHEM...

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CHEM 107-528 September 17, 2007 Experiment 2: Aqueous Solutions and Solution Stoichiometry SUMMARY The purpose of this experiment was to learn about what types of ions and molecules are present in solutions. This was done through observing the conductivity of an acid base reaction. The results of these observations allow one to classify solutions as strong or weak electrolytes or as non-electrolytes. A probe connected to a computer allowed us to find the conductivity of the given chemicals in Part A. Part B consisted of a titration experiment also using the probe to find the conductivity. During Part B a stir bar was placed into a beaker filled with 70 mL Ba(OH) 2. H 2 SO 4 was added until the equivalence point was found. RESULTS Part A Compound Conductivity (micro Siemens, μS) NaCl 810 CaCl 2 620 CH3COOH 124 HCl 2040 CH 3 OH 55 H 2 O (distilled) 53 H 2 O (tap) 57 Part B See attached data sheets GRAPHS AND CALCULATIONS Part B: Equivalence Point = (trial 1) 6mL (trial 2) 5.5mL Number of moles of H
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Aqueous Solutions and Solution Stoichiometry - 1 CHEM...

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