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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 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 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 25° C?
A mixture of NaBr and NaI has a mass of 1.620 g. When treated with excess AgNO3, it yields a mixture of AgBr and AgI which has a mass of 2.822 g. What mass of NaI was present in the original mixture?
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Compare the amounts of reactants and products that will be present when the system reaches equilibrium. c. When the system reaches equilibrium, the value of K will be: A) less than 1 B) equal to 1 C) greater than 1
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A scuba diver with a lung capacity of 5.2 L inhales a lungful of air at a depth of 45 m and a pressure of 5.5 atm. If the diver were to ascend to the surface (where the pressure is 1.0 atm) while holding her breath.
The Ksp of zinc oxalate (ZnC2O4) at a given temperature is 7.87 x 10-9. Calculate the molar solubility at this temperature. Use E notation
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