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25 solutions

Coordination Complexes

Q. Gold is isolated from rocks by reaction with aqueous cyanide, CN-: 4Au (s) + 8NaCN (aq) + O2 (g) + H20 ---------> 4Na[Au(CN)2] (aq) + 4NaOH (aq). Which atoms from which compounds are being oxidized, and which atoms from which compounds are being reduced?

Solved • Aug 12, 2019

Coordination Complexes

Q. Gold is isolated from rocks by reaction with aqueous cyanide, CN-: 4Au (s) + 8NaCN (aq) + O2 (g) + H20 ---------> 4Na[Au(CN)2] (aq) + 4NaOH (aq). The [Au(CN)2]- ion can be converted back to Au(0) by reaction with Zn (s) powder. Write a balanced chemical equation for this reaction?

Solved • Aug 12, 2019

Coordination Complexes

Q. Find the coordination number for the following complexes: [Co(en)3]3+ [Cr(H2O)6]3+ [Fe(CN)6]4- [Co(NH305Cl]2+ [Ag(NH3)2]+ [Co(en)2(CN)2]+ [Ag(en)2]+

Solved • Aug 11, 2019

Coordination Complexes

Q. Give the charge of a central metal in the complex ion for the following compounds: (a) [Fe(F)5]3- (b) [Cr(en)2(Cl)2]ClO3 (c) Na2[Co(Br)4]

Solved • Aug 10, 2019

Coordination Complexes

Q. Give the coordination number for: (a) Pt in [Pt(NH3)Cl3]F (b) Co in Na[Co(en(Cl)4] (c) Ag in [Ag{CN)2]-

Solved • Aug 10, 2019

Coordination Complexes

Q. Rank the following complex ions in order of increasing Δ and energy of visible light absorbed: [Cr(NH3)6]3, [Cr(H2O)6]3, [Cr(NO2)6}3.

Solved • Jul 30, 2019

Coordination Complexes

Q. Give the number of d electrons (n of d^n) for the central metal ion in the following compounds. (a) [Cr(H2O6)](ClO3)2 __ d electrons (b) [Mn(CN)6]2- __ d electrons (c) [Ru(NO)(en)2Cl]Br __ d electrons

Solved • Jul 30, 2019