Question

Calculate the molar solubility and Ksp of borax at each of the measured temperatures. 

Equations

Na2B4O5(OH)4·8H2O(s) ⇌ 2Na+(aq) + B4O5(OH)42-(aq) + 8H2O(l)

B4O5 5(OH)42-(aq) + 2H+(aq) + 3H2O(l) → 4H3BO3(aq)

Concentration of standardized HCl solution (M)
0.1563
Sample 1
Sample 2
Sample 3
Temperature of sample (°C)
0.60
16.00
25.00
Volume of sample analyzed (mL)
5.00
5.00
5.00
Initial buret reading (mL)
24.60
19.20
8.20
Final buret reading (mL)
29.53
28.00
20.76
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Equilibrium Concepts

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Transcribed Image Text

Concentration of standardized HCl solution (M) 0.1563 Sample 1 Sample 2 Sample 3 Temperature of sample (°C) 0.60 16.00 25.00 Volume of sample analyzed (mL) 5.00 5.00 5.00 Initial buret reading (mL) 24.60 19.20 8.20 Final buret reading (mL) 29.53 28.00 20.76