Exam1_F08_key - Name: exam 1 key Chem 230 Exam #1 September...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Name: exam 1 key Chem 230 Exam #1 September 29, 2008 Discussion Section #: Use only the space provided to answer the questions. If you need more work space, start your answer on the back of a page and then write only your final answer in the space provided. Anything written in the margins and on the back of pages will not be graded. No answer that is much longer than requested will be read. The use of clear diagrams or equations to answer some problems is encouraged. Make sure you final answer is clearly marked. The exam totals to 150 points. Multiple Choice: Mark all multiple choice clearly, by both circling the correct choice and writing the letter. Each multiple choice question is worth 3 points. 1) The hydroxide ion, OH - , is a much stronger Lewis base than F - . If you combined 1 mol of Co(III), 4 mols of NaOH and an excess of NaF, what would you expect the formula for the resulting Cobalt coordination compound to be, assuming it had a coordination number of 6. a) Na 3 [CoF 6 ] b) Na 2 [Co(OH) 3 F 3 ] c) Na 3 [Co(OH) 4 F 2 ] d) Na 2 [CoF 6 ] 2) Is the Co(III) free ion diamagnetic or paramagnetic? a) diamagnetic b) paramagnetic 3) If OH - is a strong field ligand, how many unpaired electrons would there be in the d orbitals of Co(OH) 6 -3 ? a) 0 b) 1 c) 3 d) 4 4) If F - is a weak field ligand, how many unpaired electrons would there be in the d orbitals of CoF 6 -3 ? a) 0 b) 1 c) 3 d) 4 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Name: exam 1 key 5) Diamond and graphite are both elemental carbon, however diamond has a much higher lattice energy (U lat ). If you designed a process to convert graphite into diamond, it would most likely involve: a) an input of heat and work into the system b) a removal of heat and work from the system c) an input of heat and a removal of work d) no net change in energy 6) If the process described in question 5 is called Process A and involves going directly from solid graphite to solid diamond, then I design a second process B that involves taking graphite to gaseous carbon and then condensing it to Diamond. Would you expect that: a) Process A would have a greater change in overall energy b) Process B would have a greater change in overall energy c) They would both have the same change in overall energy 7) Why are the atomic 2p orbitals of F higher in energy than O? a) Relativistic effects b) Penetration c) e - e - repulsion 8) If two transition elements join together along the z-axis to form a metal-metal bond, which of the d -orbitals will form δ (delta) bonds? a)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/18/2011 for the course CHEMISTRY 230 taught by Professor Gottfried during the Spring '10 term at University of Michigan.

Page1 / 8

Exam1_F08_key - Name: exam 1 key Chem 230 Exam #1 September...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online