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The B4O5(OH)4 2- ion, present in 5.0-mL of a saturated Na2B4O5(OH)4 solution at a measured temperature, is titrated to the bromocresol endpoint with 3.25 mL of 0.291 M HCl.
a. How many moles of B4O5(OH)4 2- are present in the sample?
b. What is the molar concentration of B4O5(OH)4 2- in the sample?
c. Calculate the Ksp for Na2B4O5(OH)4 from this data.
d. What is the free energy change for the dissolution of Na2B4O5(OH)4 at this temperature?
Calculate the molar amounts of NaOH used in the reaction with the HCI solution and with the HC2H3O2 solution?
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