Based on the information from a borax equilibrium and thermodynamic study in the
ID: 986466 • Letter: B
Question
Based on the information from a borax equilibrium and thermodynamic study in the table to the right, please show how to come up with each of the following: the equilibrium concentrations of B4O5(OH)42- For each of the samples and also, i need to calculate the Ksp for each borax sample, the delta H (enthalpy in units of kJ/mol), the delta G free enery change,and the delta S (entropy change in units of J/mol*K)
Sample
sample 1
5 degrees C
Sample 2
15 degrees C
Sample 3
35 degrees C
Sample 4
45 degrees C
Sample 5
Room Temp
Initial buret reading
39.5 mL
32 mL
24 mL
29 mL
50 mL
Final buret reading
32 mL
24 mL
15.5 mL
16.5 mL
39.5 mL
Volume of HCL used
7.5 mL
8 mL
8.5 mL
12.5 mL
10.5 mL
Actual Sample Temp C
5.7 C
15.1 C
34.3 C
44.7 C
25 C
Sample
sample 1
5 degrees C
Sample 2
15 degrees C
Sample 3
35 degrees C
Sample 4
45 degrees C
Sample 5
Room Temp
Initial buret reading
39.5 mL
32 mL
24 mL
29 mL
50 mL
Final buret reading
32 mL
24 mL
15.5 mL
16.5 mL
39.5 mL
Volume of HCL used
7.5 mL
8 mL
8.5 mL
12.5 mL
10.5 mL
Actual Sample Temp C
5.7 C
15.1 C
34.3 C
44.7 C
25 C
Explanation / Answer
V in ml T in C C T in K K del H del S delG sample 1 7.5 5.7 0.133333 278.7 308.9482 25.35229 0.090966 24.83378 sample 2 8 15.1 0.125 288.1 299.4079 24.56941 0.085281 23.28167 sample 3 8.5 34.3 0.117647 307.3 300.5756 24.66523 0.080264 21.91216 sample 4 12.5 44.7 0.08 317.7 211.3086 17.33999 0.05458 14.90027 sample 5 10.5 25 0.095238 298 235.9592 19.36282 0.064976 17.73842
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