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Suppose you want to measure the iron content of a sample of water run-off. A 25.0 mL sample was acidified with nitric acid and then treated with excess KSCN to form a red complex that can be analyzed with spectroscopy. The solution was then diluted to 100.0 mL and placed in a cuvet with a path length of 2.48 cm. For comparison, a 10.0 mL reference sample of 6.80 x 10-4 M Fe3+ was also treated with nitric acid and KSCN and diluted to 50.0 mL and placed in a cuvet with a 1.00 cm path length. If both solutions gave the same abs value, what was the concentration of iron in the water run-off sample?The answer should be: 2.19 x 10^-4 M
Which of the following electron transitions corresponds to emission of the longest wavelength light
Explain how the enthalpy, entropy, and free energy of this system change as the dissolving process proceeds. 2. Of the three parameters, AS, AH, and AG, specified in part 1, which has a sign diferent from the other two? Explain.
the best design for rockets is one in which both fuel materials runout at the same time to minimize excess mass. if the
Explain the Coordination Chemistry and Chemical Speciation Utilized in the Analysis of Fluoride in Water Samples by Fluoride Ion-Selective Electrode
Construct a plot of the Gibbs free energy of this system as a function of partial pressures of BrCl as the reaction approaches equilibrium.
Assuming that the calibration curve passes through the origin, what absorbance would be recorded for a solution with a Pb(NO_3_)_2_ concentration of 0.335 M.
Indicate the approximate location (cm-1) in the IR Spectrum where you would expect to see one or two absorptions that distinguish n-butyl, sec-butyl, and isobutyl from each other.
The compounds below cannot be identifed from IR and H NMR spectra alone. Explain. Suggest how other types of spectroscopy might be useful in solving the structure
when sulfuric acid is a component of polluted air it chemically attacks statues memorials and monuments made from
Outline an energy level diagram showing the d-orbital splitting, and label all orbitals and give symmetry designations for the two d-orbitals sets.
A volume of 200mL of nitrogen is collected over water at a temperture of 24 degrees celcius and the atmospheric pressure of 100 kPa. What will be the volume of dry nitrogen at 24 degrees celcius and 125 kPa?
Explain polonium crystallizes in a simple cubic lattice the Po atoms are at the lattice points only. Explain if the density of the metal is 9.31 g/cm3 define what is the unit cell edge length in pm
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