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23 Nov 2019
The B4O5(OH)4^2- ion, present in 5.0 ml of a saturatedNa2B4O5(OH)4 solution at a measured temperature, is titrated to thebromocresol green endpoint with 6.51 mL of 0.146 m HCl.
a) How many oles of B4O5(OH)4^2- are present in the sample?
b) What is the molar concentration of B4O5(OH)4^2- in thesample?
c) Calculate the Ksp for Na2B4O5(OH)4 from this data.
d) What is the free energy change for the dissolution ofNa2B4O5(OH)4 at 25° C?
The B4O5(OH)4^2- ion, present in 5.0 ml of a saturatedNa2B4O5(OH)4 solution at a measured temperature, is titrated to thebromocresol green endpoint with 6.51 mL of 0.146 m HCl.
a) How many oles of B4O5(OH)4^2- are present in the sample?
b) What is the molar concentration of B4O5(OH)4^2- in thesample?
c) Calculate the Ksp for Na2B4O5(OH)4 from this data.
d) What is the free energy change for the dissolution ofNa2B4O5(OH)4 at 25° C?
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