Chemistry - Unit 6 Review 1. Parts of a chemical equation. Label all parts of the following che~cal equation
A
B
---------~~--------'\
Pb(N03 )2 (aQ)
+ rKICaQ )
(
)
i
'\
+ 2KN03 (aq )
Pb1 2 ( S )
i
D
C
i
E
It( me +0 VI+: s c: rAJ ~}-+- ;t~ -I-
F
B:_-----'f_r__
odu
_c----'--f.s_·_ _ __
A:
E:
A
r
D: _~_I--t ~_
. _/_
0:-" _ _ _ _ _ __
I '= - - - - -
F:_---""S"-----p'-"
'-----+---"~=-----"S=----C-_l6_s_c-=--~/
r ·p-f'-" __
S<-<-6Sc r1'p+ (ro..-h"D) a. Explain the meaning of the subscript (aq) and why do some reactants must be in
this state in order to react:
(O-¥- ) ~
O- F C t t [
h-k- . f-, ~ -/-c
/..:rn
~~J2 vL ~7 ?J~.
:::
VV1-o
Vt
evnd
J{. o c fa--n+s
J/1.£e J -Iv
~"YvJ ;;t;4 ~/'~4
c.:W /
/
C. hu/)j' e
c1
r
b . Draw a diagram representing the reaction above and explain what type of reaction it
is. Identify specta~ ions if there are any.
0, 0
~~~ ~
c
A '?~
Ph W
en
,
:r~ b
v
tJ
,v
tJ ~
~~
p.
&g :o
Q
Q
/I
ty
~
r. ,
r.
~
r
2. Balance and classify the following chemical reac 'n c~g to the categories
discussed in class. (precipitation, combustion, redox, decomposition, syntheis)
a)
Zn (s) + C2 AgN0 3 (aq) ~ Zn(N03h (aq) + c1 Ag (s)
b)
1 N2 (g) + 3 H 2 (g)
d)
Ba(HCO:3) 2 (s) ~
e) 10 Al (s)
~ J... NH 3
(g)
BaC0 3 (s)
+
+ 3 8 8 (s) ~ '2 Al 28 3 (s)
f) :-7C
C\. 6H6 + 15 O 2 ~ /'cZC0 2
Chemistry - Mr. Montero
!Gz..dott­
H 2 0 (g)
+
Sy
,J' / 's /
+ ~ H 20
11
-J-k
CO 2 (g)
De C-O J'V/p O s ;' h '->-VI I2ecic,x. Co
j'
C'"V"L
. y..--, b "(..W 'TZ1
U6 review
3. Write and balance the full equation (reactants and products) for the following
reactions:
a) Toluene, C7Hs, combusts releasing heat.
b) Barium chloride solution reacts with potassium sulfate solution, a solid forms
~C/~(a..-''f-J\ +- k 2- ~Q"r (~)-~
Bel SOy
+-
;Z ke/ (C). 'i1)
U)
Ba ;)~ + 50 '1 J - - ) I3Q j Oy
c) Synthesis of zinc sulfide from elemental Zinc and Sulfur, Ss
d) Reaction between nickel metal and aqueous nitric acid (HN0 3), a gas forms
;J
·~S)-t-
;1/;'
f-
I+/v 0 .3 (o-.~J
J L i +-
oZ/T
- -~
#/ (/JcJ ~ ) "L{.,t;
-:;>
1.
}
/V ;
Z-+.-
­
-I- 1--/;;..
lid­
rj)
(3)
e) Aluminum carbonate is heated and decomposes into solid aluminum oxide and
carbon dioxide
+-
--~
3Co;J..
f) Synthesis of dinitrogen pentoxide from its elemental gases
4. Sketch the energy bar graph that represents the Ek and Ech and energy transfers at
various stages in reactions "a" and "e" of the previous sections.
Initial
Ek
Ei
System
Intermediate
System System
Intermediate
System
Ech -----~I
::-~:::::l~~
------
-
Initial
Ek
Ei
Ech
---------- ~
:~:::::~
Chemistry - Mr_ Mon tero 2
U6 review