Experiment #2

Experiment #2 - nonelectrolyte Even while the solutions...

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Experiment #2 Aqueous Solutions and Solution Stoichiometry Chemistry 117 - 529 Kevin Falting Wednesday September 23 rd , 2009 Lab Partner: Zach Thomas Summary:
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Results: Part A 0.1M NaCl 11205 µS/cm 0.1M CaCl 2 17856 µS/cm 0.1M CH 3 COOH 710 µS/cm 0.1M HCl 29513 µS/cm 0.1M CH 3 OH 162 µS/cm Distilled Water H 2 O 29 µS/cm Tap Water H 2 O 910 µS/cm Electrolytes are substances which, when dissolved in water, break up into cations and anions, or you can say they ionize. Strong electrolytes ionize completely, while weak electrolytes ionize only partially. Using this as a guideline we can now classify roughly what kinds of electrolytes are in our table. NaCl, CaCl 2 , and HCl are all strong electrolytes because they are most conductive and dissociate almost completely. Tap Water H 2 O, CH 3 OH, and CH 3 COOH are weak electrolytes because while they still conducted some electricity, they did not dissociate themselves enough to be more conductive in the solution. Distilled water H 2 O, did not conduct any electricity through the solution and therefore leave me to believe that distilled water is a
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Unformatted text preview: nonelectrolyte. Even while the solutions have the same molar concentration, they dissociated differently, some more than others, leaving us with stronger electrolytes with higher conductivity, and some solutions with weaker electrolytes dampening conductivity. An interesting difference between tap water and distilled water is that with distilled water, all or most of the impurities have been removed unlike tap water which has various ionic compounds in it which make it behave more like a weak electrolyte. NaCl → Na + + Cl-CaCl 2 → Ca 2+ + Cl-CH 3 COOH ↔ CH 3 COO-+ H + HCl → H + + Cl-CH 3 OH ↔ CH 3 O-+ H + Part B Approximate equivalence point of H 2 SO 4 = 22.59mL Equations Used: m = (y2 – y1)/(x2 – x1) y = mx + b Molarity = Moles/Volume Calculations: 0.08025M * 0.02259L = 3.55 moles of H 2 SO 4 added. 3.55 moles / 0.07L =...
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Experiment #2 - nonelectrolyte Even while the solutions...

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