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Consider a saturated solution of calcium fluoride in 0.039 M potassium nitrate. Complete the following tasks, and then answer the question.
Write the chemical equation corresponding to Ksp. Write the defining expression for the thermodynamic solubility product constant, Kspo. Write the defining expression for the conditional solubility product constant, Ksp'. For the Ca2+ and F- ions, write the mathematical relations defining activity of each ion in terms of its concentration and activity coefficient. Based on your answers above, derive a relationship for Ksp' in terms of Kspo and activity coefficients, and calculate the value of Ksp', given that Kspo = 3.9 x 10-11.
Compute the activity coefficient for each ion using the Debye-Huckel equation.
You can disregard the contribution of the dissolved CaF2 to the overall ionic strength. Also disregard the formation of any HF in the equilibrium solution.
An element has ccp packing with a face-centered cubic unit cell. Its density is 11.4 g/mL and the unit cell volume is 1.21 x 10-25 L. Calculate the molar mass (g/mol) of the element to three significant figures.
What is the molarity of an unknown acid if 40.5 ml of the acid can be titrated
The mass of an electron is 9.11× 10-31 kg. What is the uncertainty in the position of an electron moving at 1.00 × 106 m/s with an uncertainty of ?v = 0.01 × 106 m/s
What is the [Cu2+] concentration at 25 oC in the cell Zn(s)|Zn2+(aq, 1.0 M)||Cu2+(aq)|Cu(s)? The cell emf is 1.03 V. The standard cell emf
What volume of pure O2(g), collected at 27°C and 746 torr, would be generated by decomposition of 128 g of a 50.0% by mass hydrogen peroxide solution?
Methane gas (CH4) comprises 7 x 10-5 % by mass of the Earth's atmosphere. What is the residence time of the gas in the atmosphere if it is being lost to the methane sinks at the rate of 4 x 1011 kg yr-1.
Calculate w (in kJ) when 376 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 335 K:
A cell measured by a student was found to be -0.461V against a Ag/AgCl reference electrode (0.222V). What is the potential when measured against SCE and NHE
How long would it take to electroplate a metal surface with 0.500 g nickel metal from a solution of Ni 2+ with a current of 4.0 A?
the dehydration of beta-hydroxy ketone occur so readily to produce the alkene compared with all the unsuccessful effort to dehydrate an alcohol under basic conditions?
Methanol, ethanol, and n-propanol are three common alcohols. When 1.00 g of each of these alcohols is burned in air, heat is liberated. Calculate the heats of combustion of these alcohols in kJ/mol.
do only ionic compounds dissolve with an evolution or absorption of heat...what about molecular compounds like sucrose, glucose, aspartic acid
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