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Report - Entropy Of Borax Dissolution (5pts) Enthalpy and Entropy Changes of Dissolving Borax How will you collect data for this experiment? in-person Report Sheet
Report - Entropy Of Borax Dissolution (5pts) Enthalpy and Entropy Changes of Dissolving Borax How will you collect data for this experiment? in-person Report Sheet -60 C sample: Exact volume of borate solution transferred (mL) Actual temperature (C) 5.00 59.9 -50C sample: 5.00 Exact volume of borate solution transferred (mL) Actual temperature (C) 50.0 -40C sample: Exact volume of borate solution transferred (mL) Actual temperature (C) 5.00 40.0 -30C sample: Exact volume of borate solution transferred (mL) Actual temperature ("C) 5.00 29.9 20 C sample: Exact volume of borate solution transferred (ml) Actual temperature (C) Record the exact concentration of HCl used in the experiment (M) 5.00 21.0 0.450 ~60 C sample: Blue Initial color of the solution Initial buret reading (ml) Final buret reading (mL) Color of the solution at the endpoint 0.00 21.10 Green 50C sample: Initial buret reading (mL) Final buret reading (ml) 2.40 17.10 40 C sample: 0.00 Initial buret reading (mL) Final buret reading (mL) 11.20 -30C sample: Initial buret reading (mL) Final buret reading (mL) 0.00 5.34 -20 C sample: Initial buret reading (mL) Final buret reading (mL) 20.90 23.95 (20pts) Calculation of Borax Solubility Products Use the data you collected to complete the calculations in the following table. Report Table BX.3. Data and Calculations Table view List view Data and Calculations for each titration -60 C sample --50C sample -40 C sample 30C sample 20 C sample Final buret reading (mL) 21.10 17.10 11.20 5.34 23.95 Initial buret reading (mL) 0.00 2.40 0.00 0.00 20.90 Volume of HCl used (ml) 21.10 14.7 11.20 5.34 3.05 (HCI) (M) 0.450 0.450 0.450 0.450 0.450 Moles of HCl used (mol) Moles of borate present (mol) Volume of borate solution (mL) 5.00 5.00 5.00 5.00 5.00 [Borate) (M) Ksp In(Ksp) Actual temperature (C) 59.9 50.0 40.0 29.9 21.0 1/T(K) (5pts) Calculating Enthalpy and Entropy of Borax Dissolution Plot your values of In(Ksp) vs. 1/T and find the slope and yintercept of the best fit line. Use the equation for the best fit line and equation BX.2 to calculate AH and AS for dissolving Borax In(K) = 4 + 4 (Equation BX.2) (1 pts) What is the slope of your best fit line in the plot? (1pts) What is AH (kJ/mol)? (1 pts) What is the y-intercept of your best fit line in the plot? (1pts) What is AS (J/mol)
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