Question

Thermodynamics: The Solubility of Borax Report Sheet Concentration of HC: 0.2m Your saturated solution data: Beaker 1 Temperature Volume HCI I 55.1°C 40.5 mL 0.81M 2.13 2 3 44.4°C 34.9°C 24.55mL 14.3mL 0.401m 0.266m 1 0.473 10.094 4 24.5°C aq mL 0.14 0.023 5 15°C 5.0mL 0.112M 0.006 [B.O.(OH)?1

concentration of borate

solubility of borax

each beaker contained 5.00 mL of borax

Answer 1

Borax concentration is calculated:

[Borax] = M * V HCl / 4 * V Borax = 0.2 M * 40.5 mL / 4 * 5 mL = 0.405 M

Trial 2: 0.2455 M

Trial 3: 0.143 M

Trial 4: 0.09 M

Trial 5: 0.056 M

Ksp is calculated:

Ksp = [B4O5-] * [OH -] ^ 4 = (0.405) * (4 * 0.405) ^ 4 = 2,789

Trial 2: 0.228

Trial 3: 0.015

Trial 4: 0.0015

Trial 5: 0.00014

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