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The organic compound 18-crown-6 (see preceding problem) also binds strongly with the alkali metal ions in methanol: K++18-crown-6?[complex]+. In methanol solution, the equilibrium constant is 1.41*106.
A similar rxn with Cs+ has an equilibrium constant of only 2.75*104. A solution is made (in methanol) containing 0.020mol/L each of K+ and Cs+. It also contains 0.30mol/L of 18-crown-6. Compute the equilibrium concentrations of both the uncomplexed K+ and the uncomplexed Cs+.
A chemist has isolated a new natural product and determined its molecular formula to be C24H40O4. In hydrogenation experiments the chemist found that each mole of the natural product reacted with two moles of H2. How many rings are present in the ..
Students in the lab place some sodium chloride in the beaker and remassed it to obtain a mass of 73.25 grams using a digital balance. Find the mass of salt in the beaker.
Calculate the molarities of all ions present in a solution made by mixing 1.50*10^2 mL of 2.00*10^-2 M Ba(OH)2 with 1.00*10^2 mL of 5.00*10^-2 M HCl
Mercury (I) cyanide is a severely toxic substance with a Ksp of 3.8x10^-40. If the following solutions are combined, what is the final concentration of cyanide? i. 500. mL of a 0.47 M Hg2(NO3)2 solution; ii. 500. mL of a 0.77 M NaCN solution
if the reaction occurs at atmospheric pressure p 1 atm how much work in joules is done by the system in pushing back
consider the chemical species if5 and if4a. identify appropriate bond angles of eachb. identify orbital hybridization
How can one confirm the identity of a peak in a chromatogram. How does one choose a solvent in HPLC
Calculate the number of moles of B at each time in the table. 0 s mol 40 s mol 80 s mol 120 s mol 160 s mol (b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s. 0 - 40 s mol/s 40 - 80 s mol/s 80 - 120 s m..
If you are given a Beer's Law plot and a value for the absorbance of an unknown solution how will you determine the concentration of the unknown solution
Your friend repeats the above experiment and observes growth of all 4 organisms on both plates. Provide an explanation for her results.
1) Among the following equilibrium expressions for the dissolution of calcium fluoride (CaF2) in water... the correct expression is?
One mole of any gas has a volume of 22.414 L at STP. What are the densities of the following gases in g/L at STP. a) CH4 b) CO2
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