53. Solving a chemistry problem
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4. Nickel chloride solution is contained in a flask with a volume of 250 cm3. To 10.0 cm3 of this solution, 15.0 cm3 of a 0.0100 M solution of complexone III was added, the excess of which was titrated with 4.5 cm3 of a 0.010 M solution of magnesium sulfate. Determine the mass of nickel contained in the solution.
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