When copper reacts with nitric acid, a mixture of NO(g) and NO2(g) is evolved. The
Chapter 18, Problem 18.179(choose chapter or problem)
When copper reacts with nitric acid, a mixture of NO(g) and NO2(g) is evolved. The volume ratio of the two product gases depends on the concentration of the nitric acid according to the equilibrium 2H1 1aq2 1 2NO3 2 1aq2 1 NO1g2m3NO2 1g2 1 H2O1l2 Consider the following standard reduction potentials at 258C: 3e2 1 4H1 1aq2 1 NO3 2 1aq2 h NO1g2 1 2H2O1l2 % 5 0.957 V e2 1 2H1 1aq2 1 NO3 2 1aq2 h NO2 1g2 1 2H2O1l2 % 5 0.775 V a. Calculate the equilibrium constant for the above reaction. b. What concentration of nitric acid will produce a NO and NO2 mixture with only 0.20% NO2 (by moles) at 258C and 1.00 atm? Assume that no other gases are present and that the change in acid concentration can be neglected.
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