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The enthalpy of vaporization of chloroform (CHCl3) is 29.4 kJ mol-1 at its normal boiling point of 334.88 K. Calculate
(a) the entropy of vaporization of chloroform at this temperature and
(b) the entropy change of the surroundings
a buffer composed of .250 mol H2PO4- and .250 mol HPO4^2- diluted with water to a volume of 1.00L. the pH of the buffer is 7.210 how many moles of HCl must be added to decrease the pH to 6.700
In a voltaic cell, the anode is negative relative to the cathode. Oxidation occurs at the anode of either type of cell (voltaic and electrolytic).
Consider the titration of 100.0 mL of 0.100 M H2NNH2 (Kb = 3.0 10-6) by 0.200 M HNO3. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added.
a student performs twomelting point determinations on a crystalline product. in onedetermination capillary tube
The temperature of the calorimeter increases by 82.9oC (Celsius). Given that the energy of combustion (?E) for lauric is -37.1 kJ/g, calculate the heat capacity of the bomb calorimeter. Make sure you enter kJ/C for your unit behind the number.
List and describe at least two grades of commercially available ammonium nitrate. Why does OSHA require employers to store bulk quantities of ammonium nitrate within a bin that is clean and free of contaminants? Give an example of a contaminant, and ..
A Cu electrode is immersed in a solution that is 1.00 M in [Cu(NH3)4]2+ and 1.00 M in NH3. When the cathode is a standard hydrogen electrode, the emf of the cell is found to be +0.08 V. What is the formation constant for [Cu(NH3)4]2+?
What volume of 0.2500 M strontium hydroxide is required to completely react with 75.00 mL of 0.07942 M HCI?
calculate the minimum concentration of each of these anions which would be required for precipitation to occur if the [Ag+] =0.40 M.
Oxalate ion, which can be abbreviated ox2-, is a ligand for Cu2+, forming the complex ion Cu(ox)22-. The formation constant for this ion is 3.0 x 108. The solubility of Cu(OH)2 is enhanced in the presence of oxalate
If the density of sulfuric acid is 1.05 g/ml in the original 1 L solution, then find the weight percent of sulfuric acid in solution.
The heat of vaporization of water is 40.66 kJ/ mol. Explain how much heat is absorbed when 2.46 g of water boils at atmospheric pressure
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