Thermodynamics of borax

Thermodynamics of borax - pg. 14-15) Trial Moles if HCl...

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Drew Rasmussen Chemistry 112 Lab Kate Truhler April 22, 2011 Laboratory Write-Up for Thermodynamics of Borax Solubility A. Research Questions a. How does the temperature of a solution affect the Ksp? b. What are the ΔG, ΔH, and ΔS values for the reaction? B. Observations and Results a. Observations: See Pages 13-15 in Notebook.z Table 1. Volumes and Molarities of HCl and Saturated Borax Solution at Assigned Temperature. (pgs. 13-14) Molarity of HCl (M) Trial Volume of HCl (mL) Volume of saturated sample (mL) Temperature (°C) 0.101 M 1 12.0 7.00 10.0 2 20.2 7.00 21.6 3 26.8 7.00 28.9 4 35.5 7.00 38.6 5 71.1 7.00 47.6 Table 2. Ksp Values, and Results Used in Calculations of Ksp Value (Calculations and Data on
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Unformatted text preview: pg. 14-15) Trial Moles if HCl (mol) Moles of tetraborat e ions (mol) Moles of sodium ion (mol) Conc. of tetrabo rate ion (M) Conc. of sodium ion (M) Ksp In(Ks p) Temp (K) 1/Temp (K-1 ) 1 1.21x10-3 6.06x10-4 1.21x10-3 0.173 0.346 0.021-4.57 283 0.0035 2 2.04x10-3 1.46x10-3 2.91x10-3 0.145 0.291 0.124-4.39 294.6 0.0034 3 2.71x10-3 1.35x10-3 2.71x10-3 0.193 0.774 0.116-2.16 301.9 0.0033 4 3.59x10-3 1.79x10-3 3.59x10-3 0.256 0.512 0.067-2.70 311.6 0.0032 5 7.18x10-3 3.59x10-3 7.18x10-3 0.513 1.026 0.540-0.62 320.6 0.0031 C. Claims: a. The temperature and Ksp are directly related, thus when temp increases so does Ksp. b....
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Thermodynamics of borax - pg. 14-15) Trial Moles if HCl...

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