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Zorlu, Barkın (2018) Which method is more effective in determining the amount of Pb2+ ions in mole found in water; precipitating Pb2+ ions in water sample as PbS (L1ead(II) Sulfide)by using Na2S (Sodium Sulfide) or by titrating the excess EDTA with ZnSO4 (Zinc Sulfate) solution when EDTA is added to the water sample containing Pb2+ ions? Other thesis, TED Ankara Koleji.