SampleEx4 - Chem 6 sample final exam (200 points total) @...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 6 sample final exam (200 points total) @ This is a closed book exam to which the Honor Principle applies. @ The last 3 pages contain equations, physical constants, and the periodic table. You can detach them for easy reference. @ Please write clearly and SHOW YOUR WORK. If you need to write on the back of the exam paper, please indicate this clearly. @ Some questions are more challenging than others. Allot your time accordingly, and try to answer EVERY question. @ Time is limited, so keep your answers brief and to the point. @ Please put your name both on this page and on p. 2. NAME (please print) ___________________________________________
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 1. (20 pts) An unknown compound, which contains Mn and NCS , could be either ( 1 ) tetrahedral [Mn(NCS) 4 ] 2– or ( 2 ) octahedral [Mn(NCS) 6 ] 4– . Would measuring the magnetic susceptibility of this sample be useful in identifying it? Why or why not?
Background image of page 2
3 2. (20 pts) (a, 8 pts) Match the complex with its color: [Cu(NH 3 ) 4 ] + colorless [Cu(NH 3 ) 4 ] 2+ blue Briefly explain your answer. (b, 12 pts) For each of the complexes ( 1 ) FeBr 6 3– and ( 2 ) [FeCl 4 ] 2– (this is tetrahedral) (i) give the number of unpaired electrons and state whether the complex is paramagnetic or diamagnetic (ii) give the crystal field stabilization energy
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 3. (20 pts) Use a Born-Haber cycle for the formation of MgO to find the electron affinity of O . Many physical constants useful for this problem are given on page 14. [Note--you should not simply manipulate these numbers. You must also explicitly write down the Born-Haber cycle you use.]
Background image of page 4
5 4. (20 pts) An electron in an organic molecule which contains C=C double bonds behaves like a particle in a one-dimensional box whose length is proportional to the number of carbon atoms, N. The ground state of the electron has quantum number n = N/2.
Background image of page 5

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

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 14

SampleEx4 - Chem 6 sample final exam (200 points total) @...

This preview shows document pages 1 - 6. Sign up to view the full document.

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