Lecture 304/7/06. Quiz 1. A current of 0.02 A is passed through a solution of AgNO 3 for 120 min. What mass of silver (MW = 107.9 g/mol) is deposited.

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Presentation transcript:

Lecture 304/7/06

Quiz 1. A current of 0.02 A is passed through a solution of AgNO 3 for 120 min. What mass of silver (MW = g/mol) is deposited at the cathode? 2. Name the following complex: Fe(H 2 O) 3 (NH 3 ) 3+ Farradays constant = 96,500 C/mole e -

Two ethylenediamine ligands and 2 chloride ions form a complex ion with Co 3+ Write the formula of the complex ion. What is the coordination number of cobalt? Rewrite the formula with the appropriate chloride counter ions.

Isomers: Structural Same molecular formula, different bonding arrangement 1.Coordination isomerism: 2.Linkage isomerism:

Isomers: Stereoisomers 1.Geometric (only square planar and octahedral) cis trans

Isomers: Stereoisomers 2.Optical: mirror images 1.Octahedral complexes

19-97 A student wanted to measure the copper (II) concentration in an aqueous solution. For the cathode half-cell she used a silver electrode with a 1.00 M solution of AgNO 3. For the anode half-cell she used a copper electrode dipped into the aqueous sample. If the cell gave a E cell = 0.62 V at 25ºC, what was he copper (II) concentration of the solution?

What is the oxidation number for: Fe in FeCl 3 H in H 2 Cr in Cr 2 O 7 2-

E° F 2 (g) + 2e - ↔ 2F Br 2 (l) + 2e - ↔ 2Br Ag + + e - ↔ Ag (s)+0.80 Fe 3+ + e - ↔ Fe I 2 + 2e - ↔ 2 I Cu e - ↔ Cu (s) H + + 2e - ↔ H 2 (g) 0.00 Pb e - ↔ Pb (s)-0.13 Zn e - ↔ Zn (s)-0.76 Which solution will a reaction occur? a)Br 2 mixed with Pb 2+ b)Br 2 mixed with Pb (s) c)Br - mixed with Pb 2+ d)Br - mixed with Pb (s)

Balance the following reaction. Assume basic conditions. Zn (s) + + ClO -  Zn(OH) 2 (s) + Cl -