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Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may represent C9H7NH+ as HB+ and C9H7N as B.) 0.113 mol L-1 C9H7NHBr (aq) 0.104 mol L-1 HBr(aq) 0.122 mol L-1 NaOH(aq) (1a) Provide simple instructions for preparing 1.00 L of a solution having pH = 7.00 at 298 K. Your instructions should include the volumes of the solutions required. (1b) What is the buffer capacity of the resulting solution? (The buffer capacity is the number of moles of NaOH that must be added to 1.0 L of solution to raise the pH by one unit
Calculate the pH during the titration of 25.9 mL of 0.618 M ammonia NH3 with 0.205 M HCl after 11.5 mL of the acid have been added. Kb of ammonia = 1.8 x 10-5.
What is the specific heat for the metal? Express your answer with the appropriate units. B) The molar heat capacity of silver is 25.35 J/mol
How many grams of sodium carbonate is formed from the reaction of 74.0g of sodium hydroxide and 44.0g CO2. How many grams of each material is present after the reaction
Work out the solubility of copper(II)sulfide. Take it that 1 litre of the mixture weighs 1 kg. (in g/100g), CuS (s) Cu^2+ (aq) + S^2- (aq)
Calcium hydroxide, Ca(OH)2, has a solubitlity of 1.85 g/L at 0.0 C. What is the solubility product constant (Ksp) for a saturated solution of Ca(OH)2 at 0.0 C
How to Name and Define Acids, How can you know that HNO3 is nitric acid and HNO2 is nitrous acid? How do you know the difference in endings?
Sulfur is used to crosslink isoprene (C5H8) units in naturally occurring rubber to make vulcanized rubber, which is a harder material. If it takes 4 sulfur atoms to form a crosslink with 1 isoprene unit
The average speed of a nitrogen molecule at 20oC is 515 m/sec. How many minutes will it take the nitrogen molecule to cover exactly 20 km?
Calculate the concentration (in molarity) of a Ba(OH)2 solution if 25.0 mL of the solution are needed to neutralize 20.0 mL of a 0.500 M HCl solution
The distribution constant for the metabolite between ligroin and an aqueous solution is 11.8. You extract 50.0 mL of an aqueous solution that is 0.0350 M in the metabolite with 25.0 mL ligroin. What is the concentration of the metabolite in the aq..
What effect on the calorimeter constant calculated would be observed if the calorimeter cup were made of a conducting material(such as metal)rather than plastic foam
Calculate the energy in kJ required to convert 2.11 mol of sodium metal at 25 degrees celsius to 2.11 mol of gaseous Na+ ions. (Ionization energy of Na (g) is 495.9 kJ/mol.
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