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What concentrations of acetic acid (pKa = 4.76) and acetate would be required to prepare a 0.10 M buffer solution at pH 5.0? Enter your answer to two significant figures. (For example, 0.0090 and 0.0097 each have two significant figures, whereas 0.009 has only one significant figure.)
The normal boiling point of actone is 56.2 C and the molar heat of vaporization is 32.0 kJ/mol. At what temperature will acetone boil under a pressure
The freezing point of benzene is 5.5oC. What is the freezing point of a solution of 5.00 g naphthalene (C10H8) in 444 g of benzene (Kf = 4.90oC/m)
Do you expect CN- anion to be affected by a magnetic field? Explain your reasoning. (d) What is the bond order of the anion CN- ? (e) What is the bond order of the neutral CN?
What mass of solid sodium formate (of MW 68.01) must be added to 140 mL of 0.3 mol/L formic acid (HCOOH) to make a buffer solution having a pH of 3.77? Ka = 0.00018 for HCOOH.
The molar heat capacity of silver is 25.35 J/mol (degrees C). How much energy would it take to raise the temperature of 11.8g of silver by 16.2 degrees C
One of the first steps in the enrichment of uranium for use in nuclear power plants involves a displacement reaction between and aqueous HF.
C2H4(g) + H2O(g) C2H5OH(g) 1 mol C2H4, 1 mol H2O at 355K and 1 bar. Using equilibrium constant approach, calculate the equilibrium extent of reaction and the mole fractions
Differences in boiling points, Rationalize the difference in boiling point between the members of the following pairs of substances:
Water/methanol and water/acetone are viable solvent systems for recrystallization, but water/chloroform and water/pentane are not
The pH at the ¼ neutralized point in the titration of a weak acid is 3.958. What is the pKa of this acid
In the laboratory, a student named Georgia weighed 5.05 grams of an unknown solid mixture containing benzoic acid, copper (II) sulfate and sand.
In a high-altitude city, the normal atmospheric pressure is 619.0 torr. Use the Clausius-Clapeyron equation to estimate the boiling point of water in this city. The heat of vaporization of water is 40.70 kJ/mol.
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