Chem 2 Lab 10 - Thermodynamics Study of Borax CHEM 113...

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Thermodynamics Study of Borax CHEM 113 PURPOSE
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The purpose of this experiment is to understand the methods involved in obtaining a solubility product constant, Gibbs free energy, enthalpy, and entropy of a compound, in this case borax. These values can be obtained by titration data and the proper formulas. A better understanding between the Ksp - (1/T) and the ΔG of the two different methods will be achieved. PROCEDURES Preparations of test tubes must be done by adding 5.0 mL of water to each of the 10 test tubes using a buret. Also the water level needs to be marked on each test tube with a marker. Then a preparation of a saturated borax solution needs to be done. 30 grams of borax and 100mL of water need to be placed in a 250mL beaker and warmed up to a temperature not exceeding 50 degrees Celsius. Then make sure the solution is saturated by looking for solid pieces of borax, if it’s not then additions of borax should be added. The borax solution is now ready to be sampled in the next few steps. First, allow it to cool to between 47-44 degrees Celsius while stirring and immediately take the temperature of the water bath. Then pour 5.0mL of solutions into one of the test tubes marked 45° C making sure little solids are transferred. Then repeat the previous step with another test tube. Take the temperature of the water bath. Then allow the solution to approach the temperature range of 37° C and 33° C and then take two samples
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This note was uploaded on 04/02/2008 for the course CHEM 113 taught by Professor Staff during the Spring '08 term at Western Michigan.

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Chem 2 Lab 10 - Thermodynamics Study of Borax CHEM 113...

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