Fit haux hst page 1. of 5
Septembm 28,2006
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1 .
KEY
YOW full name (PLEASE PIUNT)
CHEM111
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Your scheduled Tnmdav quiz section (please circle)
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Your scheduled Tnadav quiz instructor:
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t&t has FIVE pages--notify m immediately if it does not. Do NOT detach pnga from thc
stapk You m y use a writing implement, hand-cdculator, and your Pcriodic Tablo (&d,
honor code) as
ecratch paper is p c m h d ! As requmtad of the h d t y by the Student Executive
obtained in this course.
Committee, students must sit in every otha seat during the test. The PROPER METHOD (i.e., Problem Set 0)
must be shuwn clearly on all problems, and h a l answers must be a p m d in appropriate fm. Pay attention
to dimensions!! When blanks for amm are ~rovided,write vaw apswer to Be mad& h the blank-we
m
W
F
a
r the puposm of this test, r e p r m hydronium ion us
~30' and not ap p(@.
+
;y
rn
1. (9ph) Please fill out the table below according to the method illustrated in P.S.10.
central e' pairs
to be arranged
e' pair h p e ?
(sk*b & name)
I
molec, shape?
(sketch and m e )
f o d charges?
reso-?
drawing
comecti~b.7
wz-:!c
/'#I/
m r J nL
re*\<
I .
bow many x-bonds likely?
NO
8Wp5
No ~iESbdMf
I
a s
d
~~PYRANZDRL
* *
.
r-sWPEP
7-y-&)
'0
7-&-k(r)=o .
2- (14 pts) Sbw bv 8awr~vriate'formuIds)what
species
are pamt after each of the following bulk substances
..
laqueous
are mixad (individually) with water. CIearYy dmbne;tll'shbetween ions, molecules, and solids in the h
mixtumi.
CH30H
HC183
calcium fhiosulfate
strontium phosphate
3. (8 pts) Use the "aufbaufl and other howledgc you possess to give the actual array of eIectrons for the
following species:
k Give SHORT-mRM ELECTRON CONFIG.
B. Give ELECTRON DOT PICTURE
4. (8 pts) Define the following terms briefly and accurately ACCORDING TO YOUR LFCTURE NOTES
(do NOT illustrate them).
(a) Bronstcd base:
&v@
DWR
WAI 1 5 DZFFa;utr
(b) Hard Lewis base:
' A NoLELULE of
(d) Electronegativity
cmfPiEt
5 . (25 pts) The foilowing pairs of substances were h t , as separate substances, mixed with water. Then the wo
aqueous mixtures were combined ,with thorough dining. For e ~ c h
pair:
(a) & @) show by appropriate formula(s) what would be present in the se~arntemjxturcs;
and then
deduce and write the balanced chemtcaI eauatlon for the reacdoals) which occur(s) when the two
mixtures are combined. If no reaction occurs upon miring, write
(No reaction!)
~C.~[CO(SCN)~]
and BaCl2
(3 1(@
@I &2 f
(c)
3-
3
.
1 -1
,
I - .
-P
"f @' + 2&015~J;1
_ .
1..
-
X?,.
. .. ---.
.-.
--.A.i.
. .
,
. .
sodium phosphate and two equivalents of nitric acid
. _ -.
7
J
-
4
4
;
L
i-
...
*
-4
(3
&31Z4L-4~]
q
?2+Wr
I
5. (Continud-w same instructions as previous page)
potassium bromi and calcium setate
(1
K8
eP
c a2+
OAG@
silver sulfate and HI
3-
sodium sulfide
exmCshydrochloric acid
sr-
6. (7pts) The St. Petersburg Caves just outside of Maastricht, The Netherlands, am an amazing underground
q u q that data to the Roman Empire, Tkm are liberally dozens of miles of tunnels under the hills. If you
come with me in the spring, X might even be able to show you Napoloon'e initids on one of the wds! The
caves have been a major source of l h a t o n e (CaCa) for many cenkuies, Not surprisingly, the ma has been a
major source of European fassils,dn addition, the K-Tboundary (a very thin kyer of iridium deposited over the
earth sts a d
!
of the C h i d u b me* impad) can be obswai in betwem strata, in p l m . Sea she& consist
of Cco3depo~itdin luym with probin polymers. Circle T for True or F for F h fbr the following
statements:
@ F Iridium, clement #77, is a twsition element or transition metal.
A
F Iridium has fclectmm.
w
T@ Limestone is a surprising mineral--sum&ng like CaS would be muoh more apected. E
Jo~rJK~~
sZr50pf
F Limestons in the cave would be p o d 4 by a strong .acid.
T F If really concefltmfd solution of a
m
0
fizzing.
a
acid w& dropped on the cave floor, you might expect to see
and
a
,
,
,
T @You would expect p m water to readily diuolvc Ule limsstone in the oa-.
T
I
@ CaCQ
rue: &af
wrntour
RUE
p d e d away from the shells o f aquatic organism would be e x p t d to have significantly
different chemical behavior than the CaCa p d e d away from hestone.
NO:
&% A &to3
* PURE
7.(7points) Circle T for True or F for False for the following statements:
mA55
T @1n mass spectrometry, the x-axis of the plot is a direct plot of the mass of the fragments. A@!
cmecC
@ F GC and TLC both have a mobile phase and a stationery phase.
T
GC,the compound in the mixture with the strongest amni for the solid adsorbent material oves
M M P ~ ~ J ~\JIPM16~ X P U&=I
~S
fastest up the phk in the developing c b b w .
TO^ the GC,the ions move through a column pushed by a canier gas. MCELC(G>
M~mM*
mffw
In the MS,ions am deflected dong ?heirtrajectory by magnetic or electric fields.
~ @ ~ n ~ ~ ~ , t h c i o d i n e c h m k w m d t o t u m t h e s pi on tl osi o n i c ~ e n t s .
SfiB
T @ I ~GC,a mixture of compounds is m b i n e d inlo one peek. 66 5
HE
OF
WMRZS
9.(I6pts) (a) The cunte shown on the graph below concern hypothetical gas phase atoms X'and "Y combining
to form gas phase covalently-bonded molecular X-Y. What you must do is draw a curve for hypothetical gas
fo~owinginformation:
Imol;
9. (Continued} (b) The species will prefer to be bonded
succinct, Legible, grammatical sentences to explain your answer.
r ~ ~g o \ / r l c ~LUWR
(c).The value of AEdis for (X')(Y-)
ber ng very clear).
-
=
w
v
M
muEt
* k/Sd
=f
2/(Ji((O
(show your work below or on the graph above
5EE (i8fifH3 OR
I
(d) Given a value of the constant "k" in the Coulomb's law equation of 2.307 x
J'm and gven that by
definition 1 A = 1 x 1om'' rn, calculate AEcOuIto three significant figures and express your answer in klimol.
t ~= ,kQIC1.L.
tr
Extra credit (3pts): Write three or four concise sentences that explain what, for you, was the most interesting
part of Dr. Wej's lecture. The sentences should be legible and grammatical.
PLEDGE: I have neither given nor received any unacknowledged aid on this test.
Signed,