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Who can help solve the following problem? Mix equal volumes of 0.20 mol/L EDTA and 0.2 mol/L divalent magnesium ion solution; the pH of the solution is 8. What is the concentration of uncomplexed divalent magnesium ions?
Is 0.20 moles per liter of EDTA expressed in units of 0.5 EDTA? If so, the answer should be 0.05 moles per liter; if not, then the complexation constant needs to be taken into account, and the calculation becomes more complicated. I can’t remember how to do it either. Check the answers below.
The answer is 1.9*10 to the power of -4; I just don’t know how to calculate it
That means considering the complex stability constant and the acid effect coefficient; check the section on complexometric titration in \"Analytical Chemistry\", and then proceed with the calculations