Question: Do you expect ∆S° for the dissolution of borax to be a positive or negative number? Explain your reasoning. HomeStudy toolsMy coursesМy booksCareerLifeA student who is performing this experiment pours an 8.50 mL sample of the saturated borax solution into a 10 mL graduatedcylinder after the borax solution had cooled to a certain temperature T. The student rinses the sample into a small beaker usingdistilled water, and then titrates the solution with a 0.500 M HCl solution. 12.00 mL of the HCI solution is needed to reach theendpoint of the titration.Calculate the value of Ksp for borax at temperature T.Expert AnswerChemtutor answered thisWas this answer helpful?O 2023,336 answersB405(OH)42- -+ 2 HCI + 3 H2O => 4 B(OH)3Moles of HCl = volume x concentration of HCI= 12.00/1000 x 0.500 = 0.006 molMoles of B405(OH)4 = 1/2 x moles of HCl= 1/2 x 0.006 = 0.003 mol= moles/volume of B405(OH)42-= 0.003/0.0085 = 0.35294 MNa2B407.10H20 <=> 2 Na+ + B405(OH)4+ 8 H20[Na+] = 2 x [B405(OH)4²]= 2 x 0.35294 = 0.70588 MKsp = [Na+]°[B405(OH)4²]%3D= 0.705882 x 0.35294= 0.176

The detailed solution of your question given below-- According to the given equation entropy decreases that means have negative sign. Generally we know that when number of reactant molecules greater than the product the entropy is decreases.Hence entropy is negative.Conclusion-- Entropy have negative sign according to reaction given above.