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11/11/201
REACTIONS OF THE WEEK -- #7
1.
(a) Liquid bromine is addedto a container of sodium iodide crystals.
(3ra LQ) +-
02
Nt) T
d No.
•._=-?
($)
;3r
(S)
1-
r
a (5:)
(b) Describe the significant visual aspect of this reaction with regard to color.
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2.
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(a) A small piece of sodium metal is added to distilled water.
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-4-
c2 ,Ja.t!:)
-I
cQ
.;)
J1c3,O ())
~
H?-(J (1)
;)
iJfA.
C)
-7
0II (11.1)
lid [J )
+
Ale... -t (CU/)-I
oH ;~)
:9
+
~
{j)
(b) If a drop of phenolphthalein was added to the resulting solution, what color would be
observed? Explain.
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3.
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~
i 0#
;t .;fk ~
dae
(a) A bar of zinc metal is immersed in a solution of copper(II) sulfate ..
Cu. Sa
1: r'\ (~l"
7 , (r) +
'Z:v'l -
I')
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W
\f
(~)
i!J1 SOl.f(Ct~)
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~
.2
..z ¥J
--?-
(tt~)
(1(S)
-f
.Ii
rl+
(tt~)"'It.«
(S )
(b) What evidence ofa chemical change would be observed in this reaction?
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4.
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..;..pJ ~~
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tC-l'J;f.ld
rhd
4
(a) A strip of magnesium is added to a solution of silver nitrate.
fV~ CS) r
f~
(S)
~
4
6 AlO.3
{~1>
d ~ + (ag)
fVJJ (AlO~)iJ.
-'?
-~
fly
dl+(aa)
11
(ag) +
d
11
(S)
+ ,;)
1J'
(b) How many electrons, in total, are transferred in this reaction?
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e. -
a,\Q.
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fllA.l J .
r1 OA,d ~
11-+ ~
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(S)
-