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Need some assistance: 2a) Calculate the pH of a buffer solution that is 0.250 M in HCN and 0.170 M in KCN. For HCN, Ka = 4.9 x 10^-10 (pka = 9.31). Use the equilibirum approach to calculate this pH. 2b) Repeat the pH calculations for the previous question, but this time use the Henderson-Hasselbalch approach.
Are the physical and chemical properties of a compound necessarily similar to those of the elements of which it is composed
The rate of a first-order reaction is followed by spectroscopy, monitoring the absorption of a colored reactant at 520 nm. The reaction occurs in a 1.48- cm sample cell, and the only colored species in the reaction has an extinction coefficient of..
Determine the enthalpy change for the combustion of ammonium nitrate(NH4NO3)with decane (C10H22) in oxygen. Hf for C10H22= -249.7 kJ/mol
What is formed when benzene is reacted with Br2 then FeBr3? Then that molecule is reacted with Mg then CO2 then H
What is the pH at the point during a titration when 30 mL of 0.200 M HCl has been added to 31 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3.Answer in units of pH.
A 100.0 mL sample of water from a salt lake has a chloride ion concentration of 0.25 M. Does AgCl (s) precipitate from solution if 5.0 mL of 0.10 M AgNO3 (aq) is added to the sample
A mixture initially contains A ,B ,C and in the following concentrations:[A] = 0.700 ,[B] = 1.35 , and [C] = 0.700 . The following reaction occurs and equilibrium is established:
Find the fugacity coefficient at the reaction conditions and calculate the effect of it on the reaction conversion.
A zero-order reaction has a constant rate of 1.70×10-4 . If after 65.0 seconds the concentration has dropped to 7.00×10-2 , what was the initial concentration?
Derive Eh-pH equations based on the progressive oxidation of Mn to form oxides starting with metallic Mn. b) Plot these equations in coordinates of Eh and pH
what is the concentration of a household ammonia cleaning solution if 49.90 ml of .5900M HCL is required to neutralize 25.00 ml of the solution?
a sample of helium gas initially at 37 degrees celsius, 785 torr and 2.00L was heated to 58.0 degrees celcius while the volume expanded to 3.24L. What is the final pressure in atm.
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