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Question 5: The cation, Co2+, is able to form a complex ion, [Co(SCN)4] 2–, with the...

Question 5: The cation, Co2+, is able to form a complex ion, [Co(SCN)4] 2–, with the thiocyanate anion, SCN–. (a) Write the chemical equation for the (a) Write the chemical equation for the formation of this complex ion with the corresponding expression for the formation constant, Kf, and (b) Given Kf for [Co(SCN)4] 2– = 1 x103, explain how having SCN– in solution would affect the solubility of Co(OH)2 (Ksp for Co(OH)2 = 1.3 x 10–15).  

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a) Kf = - Col. Co2+ + 4 scn- -→ Cosen)y]? EcocSondy3] [1024] [SCN-4 Condition for preapitation of co(OH)2 conie product of co

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