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KONICHEK
BALANCING EQUATIONS
NAME_____________
BALANCE THE FOLOWING EQUATIONS AND STATE REACTION TYPE
1. ___ Ca + ____AICI3  ____CaCI2 + ____ AI _________
2. ____ HgN03 + ____NO2CO3 ____NaN03 + ____Hg2CO3______________________________________________
3. ____ KBr +____ AI(NO3)3  _____KN03 + _____AIBr3________________________________________________
4. ____Ca3(P04)2 + ____Al2(S04)3  ____CaS04 + ____AIP04_________.
5. _____ Rb + ____HC2H3O2_____RbC2H3O2 +_______H2___________________________________________
6.____ N2 + ____H2 __ NH3___________________________________________
7. ____ C4 + ____ O2  ____CO2 + ____H 2Ot__________
8. ____ AI2O3  ____ AI + O2_______________________________________________
9. _____C2H5OH + ______O2 ____CO + ____ H 2O ____________
10. ____ N2 + ___O2___N2O2 ________________________________
... "--,.,..,
Equation Writing Practice Problems (Level 2)
1.
Balance each of the following equations.
a. K3P04 + HCI -+ KCI + H3P04
b:) Na + HN03 -+ NaN03 + H2 f
_/
_. _j 8 + O2 -+ 803 f
d. Ca(C103h _ CaCI2 + O2 f
2.
Balance each of the following equations.
\U
0, potassium iodide + lead (II) nitrate
-+
potassium nitrate + lead (II)
iodide
b. iron (III) oxide + carbon -+ carbon monoxide f + iron
. heated
c. mercury (II) oxide
. mercury + oxygen f
/-'d_)calcium + aluminum chloride -+ calcium chloride + aluminum
;'--_/
e. mercury (I) nitrate + sodium carbonate -+ sodium nitrate +
'.
_
mercury (I) carbonate
f.)potassium bromide + aluminum nitrate -+ potassium nitrate +
aluminum bromide
g.; calcium phosphate + aluminum sulfate -+ calcium sulfate + aluminum phosphate
'oj
_-,
C_:; rubidium + acetic acid -+ rubidium ac_tate + hydrogen f
Copyright 1984, Instructional Horizons. Inc.
Published by J. Weston Walch, Publisher, Portland, Maine 04104-0658
Equation Writing /
63
NAME
DATE
Equation Writing Practice Problems (Levell)
I
_
I
1.
Balance each of the following equations.
a. Zn + H2SO4
-
I. (_) Na + Br2
-
ZnS04 + H2 t
NaBr
c. H2O _ H2 t + O2 t
Lf
d. CI2 + KI
-
KCI + 12
e. HN03 + LiOH
_.
-
H2O + LiN03
f_ N2 + O2
1:.:,
-
N2O
l_) NH4CI + NaOH
h. HCI + K2C03
-
NH40H + NaCI
- KC" + H2O + CO2 t
]1
2.
Balance each of the following equations.
_). a-: sodium + iodine
-
sodium iodide
1:;
b. zinc + hydrobromic acid
- zinc bromide + hydrogen t
]]
_]
t.hd.dheated
t. .
d+tc. po asslum y roXI e
_,
d. magnesium + water
.. po asslUm OXI e
wa er
- magnesium hydroxide + hydrogen t
Copyright 1984, Instructional Horizons. lnc.
Published by J. Weston Walch. Publisher. Portland. Maine 04 /04-0658
NAME
DATE
Molecular Weight and Moles / 71
Molecular Weight and Moles
Problems (Level 2)
1.
Find the molecular weight or formula weight of each of the following compounds.
a. HNO3
f. ammonium nitrate
b. Fe203
g. rubidium sulfite
c. H3PO 4
h. lithium carbonate
d. K2SO4
i. magnesium hydroxide
e. BesAs2
j. aluminum sulfate
2.
Find the weight of each of the following, expressed in grams.
a. 1.00 mol of HC2H3O2
f. 0.25 mol of sodium acetate
Practice
b. 2.50 mol of K2CrO4
g. 0.152 mol of phosphoric acid
c. 0.50 mol of Ca(CIO3h d. 0.25 mol of Ba(NO3h
h. 0.0582 mol of lithium sulfate
i. 0.418 mol of iron (III) nitrate
e. 0.375 mol of Na2Cr207
j. 1.872 mol of copper (II) acetate
3.
Find the weight of each of the following, expressed in moles.
a. 100.00 9 of CaCO3
f. 3.50 9 of arsenic trichloride
b. 100.00 9 of Ni(NO3h
g. 0.572 9 of calcium phosphide
c. 50.00 9 of C6H1206 d. 25.00 9 of K3PO4
h. 1.750 9 of calcium acetate
i. 4.904 9 of aluminum nitrate
e. 15.57 9 of Bi(OHb
j. 27.85 9 of iron (II) phosphate
ICopyright 1984. Instructional Horizons. Inc.
Published by J. Weston Walch. Publisher. Portland. Maine 04104-0658
--J
NAME
DATE
[LL
L[
[[[
II
70 / Basic Skills in Chemistry
Molecular Weight and Moles
Problems (Levell)
1.
Find the molecular or formula weight of each of the following compounds.
a. KCI
f. BaCI2 g. Cal2
b. NaF
c. HI
h. Na2S
e. RbBr
i. MgS j. AlP
d. LiBr
2.
Practice
Find the weight of each of the following, expressed in grams.
a. 1.00 mol of CaO
f. 2.00 mol of Li3P
f'
I
b. 1.00 mol of BeSe
g. 5.00 mol of CaCI2
c. 1.00 mol of KF
h. 0.50 mol of FeBr2
d. 1.00 mol of SrO
i. 0.20 mol of CU20
e. 2.00 mol of Mgl2
j. 0.40 mol of H92CI2
3.
Find the weight of each of the following, expressed in moles.
a. 18.02 9 of H2O
f. 25.38 9 of Snl2
c. 17.04 9 of NH3
g. 11.98 9 of FeO h. 15.0 9 of KBr
b. 80.92 9 of HBr
d. 190.42 9 of MgCI2
i. 25.0 9 of SrS
e. 36.75 9 of K2S
j. 50.0 9 of AIF3
Copyright 1984. Instructional Horizons. 1nc.
Published by J. Weston Walch. Publisher, Portland, Maine 04104-0658