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The product [CrFs (NH₁)] is hydrolyzed by reaction with perchloric acid. The hydrolyzed product reacts with 12M hydrochloric acid to give a compound with a sum formula Cr(NH₂) Ch₂H₂0 A solution of this compound do have an electric conductivity 5) (12) Explain which ions/molecules are complex coordinated to Cr(III) in this new product, and account for possible geometrical isomenic forms of the coordination complex Give the isomers names. Fluoride and iron Iron(111) gives strong complexes with the fluoride ion (log Ki = 5.41), and salts of the hexafluoroferrat(II)-ion is easily synthesized from aqueous solutions of iron(III) nitrate by adding a little hydrofluoric acid and excess of a fluoride salt (for example potassium fluoride KF or sodium fluoride NaF). 6) (6) Explain why hydrofluoric acid is added. The solid potassium- and sodium hexafluoroferrate(III) salts (Ka[FeFo), Nas[FeFo]) are almost white crystalline compounds 7) (6) Explain the colors of these salts. (Hint: determine the number of d-electrons and consider the position of fluoride in the electrochemical serie) Iron and copper in biological systems Iron is essential in binding oxygen in hemoglobin and myoglobin in human beings. However, octopuses and other cold-blood animals have copper-haund bemocyanin, to survive deen coll