Since K is very large, inspection of the above equation shows that 5 must be very close to 0.5. The equation can be readily solved by setting 5 = 0.5 in the numerator and the last term of the denominator, giving:
Forming the ratio of Pu4+ to Pu3+ from the third column of the reaction progress variable table gives:
Thus, essentially all of the initial tetravalent plutonium is reduced to the trivalent state by addition of the ferrous ion solution.
Solution of this equilibrium by the element-conservation method is the subject of Problem 10.15. Problem 10.3 concerns a related ionic equilibrium calculation.
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Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.