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Historically, the solid residue that is left after the methylene chloride solution is evaporated has a lower melting point that its literature value, due to impurities. Explain what impurities are present and why?
Discuss what you would observe after elution and visualization of a TLC plate having made the following mistakes in carrying out the anaylsis.
A sample contains a mixture of two dyes, A and B. The molar absorptivity coefficients for dye A are 4,875 M-1cm-1 at 628nm and 2,518 M^-1cm^-1 at 684 and for dye B are 1,578M^-1cm^-1 at 628nm and 11,543M^-1cm^-1 at 684nm. In an unknown mixture of ..
What is the molar composition of the vapor in equilibrium with a boiling liquid that has a composition of 60% A and 40% B
The value of Ksp for silver carbonate, Ag^2CO^3, is 8.10 X 10^-12 . Calculate the solubility of Ag^2CO^3 in grams per liter.
Determine the enthalpy change for the following reaction below using (a) standard enthalpies of formation, and (b) average bond energies. Explain why the two values might be different.
explain why water is not plotted on the delta t versus molecular mass graph in the analysis .(hint:what makes water different from the other 3 solvents?
Available are solid oxalic acid dihydrate, solid sodium hydrogenoxalate monohydrate, solid sodium oxalate, and liquid water. State the amounts and identities of the reagents, and the glassware, that you would use to prepare 100 mL of a buffer solu..
1. what range of values for electrostatic potential is characteristicof strong acids?2. what range is characteristic of
Provide a detailed stepwise mechanism for the acid catalyzed dehydration of cyclohexanol to cyclohexene
Explain how a disaccharide is formed from 2 monosaccharide molecules, hence explaining the difference in the chemical formulae
a chemist is studying small organic compounds for their potential use as an antifreeze. when .243g of a compound is
What is its fate as cooling occurs? To help address the question, calculate the equilibrium constant at 298 K and 1300 K for each reaction: ½ O2(g) + NO(g) ? NO2(g)2 NO2(g) ? N2O4(g)
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