A 500 ml sample containing ni2nbspwas treated with 250 ml, Ask an Expert

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A 50.0 mL sample containing Ni2+ was treated with 25.0 mL of 0.050M EDTA to complex all of the Ni2+ and leave excess EDTA. The excess EDTA was then back-titrated, requiring 5.00 mL of 0.050M Zn2+ standard. What was the concentration of Ni2+ in the original solution?

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