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A buffer system is created by first neutralizing the supernatant solution containing Pb2+, Fe3+, Ca2+, Cu2+, ad K+ ions with 6M NH3 solution, and then adding an equal additional volume of 6M NH3 solution. Explain what forms of NH3 were present in the final solution, their relative concentrations, and how they could function as a buffer.
A constant current of 5.00mA is allowed to flow through an electrochemical cell for 528 seconds as Ag+ is reduced to silver metal from 100.0mL of an aqueous sample.
which portion of the titration curve are you in to reach pH = 7? Show your calculations to prove that dilution of 10,000 gal aniline requires 0.58 gal of this acid.
Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 10.82 g of ethane is mixed with 62.90 g of oxygen.
Consider the titration of 30.0mL of 0.050M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of tirant have been added.
Calculate the molarity of a solution of glycerol made by dissolving 53.000 mL glycerol at 15 'C in enough water to make 270.00 mL of solution.
A 0.3500 g sample of brass is analyzed by the procedure in the above exercise. The Beer's Law constant for the copper ammonia complex is determined to be 7.50 x 10^-1 mL/mg.
Draw the product for the chlorination of 2-methylbutane that proceeded through a secondary radical
the calculation supports the idea that thermal pollution around cooling vents of nuclear reactors is detrimental to marine life.
The next three (3) problems deal with the titration of 461 mL of 0.501 M carbonic acid (H2CO3) (Ka1 = 4.3 x 10-7, Ka2 = 5.6 x 10-11) with 1.1 M NaOH. What is the pH of the solution at the 2nd equivalence point
A reaction mixture at 175 initially contains 522 of and 421 of . At equilibrium, the total pressure in the reaction mixture is 748 . Calculate at this temperature
Why would we obtain the same equation of state for linear molecules and non-linear molecules ( that is, taking rotations and vibrations into account?
The decomposition of hydrogen peroxide is first order in H2O2. 2H2O2 -----> 2H2O + O2 The rate constant for this reaction at 20 C is 1.8 * 10^-5 s^-1
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