lab write up #11 - Kyla Lee Chemistry 112 Lab Section 011...

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Kyla LeeChemistry 112Lab Section 011Kate Truler04/21/11Lab #11Thermodynamics of Borax SolubilityResearch Questions:1) How does the temperature of your solution affect the Ksp? 2) What are the ΔG°, ΔH°, and ΔS° of the reaction? Observations and Results:Table 1.Molarity of HCl (M)TrialVolume of HCl (mL)Volume of saturated sample (mL)Temperature (°C)0.101 M112.7 mL7 mL10°C219.9 mL7 mL20°C333.2 mL7 mL30°C440.2 mL7 mL40°C571.3 mL7 mL50°CTable 2.TrialMoles if HCl (mol)Moles of tetraborate ions (mol)Moles of sodium ion (mol)Conc. of tetraborate ion (M)Conc. of sodium ion (M)KspIn(Ksp)Temp (K)1/Temp (K-1)11.28*10-36.40*10-41.28*10-30.0910.1830.003-5.812830.003522.01*10-31.01*10-32.01*10-30.1440.2870.012-4.422930.003433.35*10-31.68*10-33.35*10-30.2400.4790.051-2.983030.003344.06*10-32.03*10-34.06*10-30.2900.5800.098-2.323130.003257.20*10-33.60*10-37.20*10-30.5141.0290.544-0.613230.0031Calculations on lab notebook page 96. Claims:1) The temperature of the solution affects the Ksp by making it greater.2) The ΔG° is 9,724.22J, the ΔH° is 103,925, and the ΔS° is 316.11 for this reaction. Evidence:

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