1.A chemist is studying the complex ions formed by group 6B transition metals. When the unknown 6B metal forms a complex ion with CO ligands, [M(CO)F*, it appears red. a. Draw the d-orbital energy diagram, including electrons, for this metal. Assume CO is a strong field ligand. b. The scientist then replaces the CO ligands of the original complex, [M(CO)6]*, with water ligands. Assume water is a weak field ligand. Draw an energy diagram of the d orbitals, including electrons, for this metal. Describe what color you might now expect the ion to appear and why. c. Name one similarity and one difference between the bond holding together the C and the O of CO and the bond between CO and the metal center? d. Does the complex in la have a higher or lower spin than that in lb? Why?

According to the Blomstrand-Jorgensen chain theory, the complex compound K2[CrCO(CN)5] is an electrolyte by releasing A. 2 K+ ions B. 1 molecule of CO C. 1 Cr3+ . ion D. 5 CN- ions The complex below shows the symptoms of coordination isomerism. a. [Rh(en)2(NH3)2]2(SO4)3 b. [Cr(NH3)6][Co(O2CO)3] c. [Pt(NH3)2Cl2] d. [Co(NH3)4Br2]+

Count electrons in Complexes:- what is the (i)oxidation state of the metal, (ii)what is the coordination number and (iii) what is the d electron count? [Co(NH3)6]CI 3 and K3 [FeCl 6

The energies of the valence d orbitals on the manganese atom in the octahedral [MnF] complex are split according to the electron box level diagram below. (Note: the d orbitals are labeled with just their subscript, to make the labels easier to read.) Complete the diagram by adding the correct number of electrons to each orbital. energy xy 2 yz 2 2 XZ 1 l X S

A compound formula with brackets is called a coordination complex, and the structure looks like a covalent compound with a transition metal central atom. The bonding that happens is often a hybrid of covalent and metallic bonding.   One method of extracting silver from mined ore is by using a complex, K[Ag(CN)2], to make the silver soluble in water. The complex is then isolated to recover the silver using the following chemical equation.   2 K[Ag(CN)2] (aq) + Zn (s) → 2 Ag (s) + Zn(CN)2 (aq) + 2 KCN (aq)  a.) 5.00 L of 1.25 M K[Ag(CN)2] is mixed with 215.5 g of zinc. Identify the limiting reactant and determine how many grams of silver are produced.  b.) The quality control chemists at the mine record collecting 672.4 g of silver. What is the yield of this reaction?

Naming complex ions Name the following metal complexes or complex ions: formula [Mo(en)3]** [Au(OH), (CO),] 3+ [Cr(H₂O)₁]** name ☐ ☐ ☑ 5

Assume each of the following complexes has a +2-charged metal center.  Which complex contains at least one hydride ligand and has the correct overall charge for the complex? Group of answer choices [Hf(bipy)(CO)2(H)2] [Hf(bipy)(CO)2(H2)] [Hf(bipy)(CO)2(H2)]2+ [Hf(bipy)(CO)2(H)2]2+