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Two liters of a buffered solution are created from 0.45 M HC2H3O2 (Ka = 1.8 x 10^-5) and 0.36 M NaC2H3O2.
(a) What is the pH of this solution?
(b) If 0.20 moles of H+ ions were added to the solution, what would be the pH?
Write a mechanism for the conversion of 1-butanol to 1-butyl bisulfate, indicating the flow of electrons.
A certain substance has a heat of vaporization of 44.01 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 289 K?
calculate the amount of heat required to heat a 3.9 gold bar from 27 to
The intial temp of the water is 19.0C and the final temp of the system is 25.1C. The heat loss to calorimeter is negligible. What is the mass of the water?
At a higher temperature, 373K, dinitrogentetraoxide partially decomposes according to the same equilibrium reaction but with slightly different results. The chemical equation is again
How many Sr2+ ions are in a mole of Sr3(PO4)2? Also, how many PO43- ions are in a mole of Sr3(PO4)2?
Determine the molarity of Ni in the 20.0 mL solution. Determine the mass in grams of Ni in the original sample. Determine the weight percent of Ni in the sample.
How many moles of OH were used to reach the end point? How many moles of H from HCl were used for back titration? How many moles of H from the solid were neutralized? What is the equivalent mass of the unknown acid?
Draw the major product for each of the following reactions. Make sure that you draw a major product that could be isolated, not just an intermediate or something that would be present only in low equilibrium population.
find the percentage composition of a compound that contains 1.94 g of carbon 0.48 g of hydrogen and 2.58 g of sulfur in
Calculate the lattice energy of Na2O for the following data: Ionization energy of Na(g):::495kj/mol, Electron affenity of O(g) for 2e-:::603 kj/mol
How much heat must be absorbed by the six pack to lower its temperature from 25.0C to 5.0C?
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