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    Plutonium in soils

    Hello i need some help with a exercies:) The first question was "calculate the Ksp of Pu(OH)4 at 25°C. I was able to solve this one:Ksp=9,77*10^-56 The second question is: Calculate the concentration of Pu4+ in equilibrium with Pu(OH)4 at pH 6 with an electrolyte concentration of 0.1 M CaCl. I...