Chelates EDTA—The Ultimate Titrating Agent for Metals

The equilibrium lies far to the right, so you can assume that virtually all the Ag reacts with 0.25 mmol of the trien (leaving 0.50 mmol trien in excess) to form 0.25 mmol complex. Calculate the molar concentrations  

U Ctielales EDTR—The llltimaTe Tilralino flgenf for llelals 

The terra chelate is derived from the Greek terra meaning clawlike. Chelating agents literally wrap themselves around a metal ion. 

The protons in EDTA are displaced upon complexing with a metal ion. A negatively charged chelate results. 

The most widely used chelating agent in titrations is ethylenediaminetetra-acetic acid (EDTA). The formula for EDTA is 

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CHELATES EDTA—THE ULTIMATE TITRATING AGENT FOR METALS... 

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