Question: Problem Cadmium (Cd) is reported to be much more toxic as the free metal (Cd2+) than when complexed with ligands. The total soluble Cd concentration

Problem Cadmium (Cd) is reported to be much more toxic as

Problem Cadmium (Cd) is reported to be much more toxic as the free metal (Cd2+) than when complexed with ligands. The total soluble Cd concentration (Ct,ca = [Cd2+] + the sum of all soluble Cd complexes) in a water is measured to be 10-4 M. In order to ensure that the toxicity of Cd is small, it is desirable to have Cd2+ be less than 10-7 M. An environmental engineer suggests adding 0.5 M NaCl to complex the Cd2+. Ignore activity corrections and the formation of any solids. Consider only the complexes of chloride with cadmiumthere are 4 (log B4 = 2.0, log B2 = 2.6, log B3 = 2.4, and log B4 = 1.7). = = = (a) Will this help keep [Cd2+] below 107 M? (b) What is [Cd2+1

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