Download Chemical Rxns WS -Soln - Glebe


Chemical Rxns Solutions
Write / Balance:
Type:
O2 (g) 
1.
4
Al (s) + 3
2
Al2O3 (s)
2.
2
HCl (aq) + 1
Ca(OH)2 (aq) 
3.
1
CH4 (g) + 2
O2 (g) 
4.
1
Zn (s) + 1
5.
1
SO3 (g) + 1
6.
2
HgO (s) 
7.
1
CaCO3 (s) 
1
8.
2
NaI (aq) + 1
Pb(NO3)2 (aq) 
9.
1
Cl2 (aq) + 2
NaI (aq) 
10.
1
Al2(SO4)3 (aq) + 3
11.
1 Al2(SO4)3 (aq)+ 3 Ca(HCO3)2 (aq) 2 Al(OH)3 (s)+ 3 CaSO4 (s)+ 6 CO2 (g)
1
2
2
HOH (l) + 1
CO2 (g) + 2
Pb(CH3COO)2 (aq) 
H2O (l) 
Synthesis
1
CaCl2 (aq)
H2O (g)
Combustion
Pb (s) + 1
Zn(CH3COO)2 (aq)
1 H2SO4 (aq)
Hg (l) + 1
1
Decomp
CO2 (g)
1
Decomp
PbI2 (s) + 2
I2 (aq) + 2
Ca(OH)2 (aq) 
SR
Synthesis
O2 (g)
CaO (s) + 1
Neut
2
NaNO3 (aq)
NaCl (aq)
Al(OH)3 (s) + 3
DR
SR
CaSO4 (s)
DR
Other
(Decomp/DR)
Predict, Write and Balance
Reaction type
12. __2_ C8H18 (l) + __25_ O2 (g)  16 CO2 (g) + 18 H2O (g)
Combustion
13. __2_ H2O (l)  2 H2 (g) + O2 (g)
Decomp
14. __2_ Na (s) + __1_ Cl2 (g)  2 NaCl (s)
Synthesis
15. __1_ Ca (s) + __2_ HOH (l) 
SR
Ca(OH)2 (s) + H2 (g)
16. __3_ H2SO4 (aq) + __2_ Al(OH)3 (s)  6 H2O (l) + Al2(SO4)3 (aq)
Neut
17. __1_ Cl2 (aq) + __2_ KBr (aq)  2 KCl (aq) + Br2 (aq)
SR
18. __1_ Na2CO3 (aq) + __1_ Ca(OH)2 (aq)  2 NaOH (aq) + CaCO3 (s)
DR
Predict, Write and Balance
Reaction type
19. Solid sodium nitrate and solid sodium metal react to form solid sodium oxide and nitrogen gas.
Other
2 NaNO3 (s) + 10 Na (s)  6 Na2O (s) + N2 (g)
20. Calcium hydride and water form hydrogen and calcium hydroxide.
Other
CaH2 (s) + 2 H2O (l)  Ca(OH)2 (s) + 2 H2 (g)
21. Xenon hexafluoride reacts violently with water to form xenon trioxide and hydrogen fluoride.
Other
XeF6 (g) + 3 H2O (l)  XeO3 (s) + 6 HF (g)
22. Barium chloride dihydrate and silver oxide react to produce silver chloride, solid barium oxide, and water.
Other
BaCl2•2H2O (s) + Ag2O (s)  2 AgCl (s) + BaO (s) + 2 H2O (l)
23. A Bunsen burner, gas furnace and gas hot-water tank all burn natural gas.
__1_CH4 (g) + __2_O2 (g) 
CO2 (g) + 2 H2O (g)
24. Propane is used as a fuel for trailers and where natural gas is not available.
__1_ C3H8 (g) + __5_O2 (g) 
Combustion
Combustion
3 CO2 (g) + 4 H2O (g)
25. Oxygen gas may be produced in the laboratory by heating potassium chlorate.
Decomp
__2_ KClO3 (s)  2 KCl (s) + 3 O2 (g)
26. Limestone mined in Alberta is decomposed by heating to produce lime.
Decomp
__1_ CaCO3 (s)  __1_ CaO (s) + __1_ CO2 (g)
27. Liquid decane is mixed with air in the carburetor and then exploded by a spark in the cylinder of a car motor.
Combustion
__2_ C10H22 (l) + __31_ O2 (g)  20 CO2 (g) + 22 H2O (g)
28. A rock may be tested for limestone content by adding hydrochloric acid.
Other
__1_ CaCO3 (s) + __2_ HCl (aq)  __1_ CaCl2 (aq) + __1_ H2O (l) + __1_ CO2 (g)
29. A candle (assume C25H52) is burned for emergency or dining light.
C25H52 (s) + 38 O2 (g) 
25 CO2 (g) + 26 H2O (g)
Combustion
MORE GENERAL PRACTICE QUESTIONS:
Predict, Write and Balance
Reaction type
1.
__2_ Na + __1_ ZnI2  __2_ NaI + __1_ Zn
SR
2.
__1_ HBrO3 + __5_ HBr  __3_ H2O + __3_ Br2
Other
3.
__1_ Al4C3 + __12_ H2O  __4_ Al(OH)3 + __3_ CH4
Other
4.
__2_ Ca(NO3)2•3H2O + __3_ LaC2  __2_ Ca(NO3)2 + __3_ La(OH)2 + _3_ C2H2
Other
5.
__1_ CH3NO2 + __3_ Cl2  __1_ CCl3NO2 + __3_ HCl
Other
6.
__2_ Ca3(PO4)2 + __6_ SiO2 + __10_ C  __6_ CaSiO3 + __10_ CO + __1_ P4
Other
7.
__2_ Cu (s) + __1_ O2 (g)  2 CuO (s)
Synthesis
8.
__3_ Fe (s) + __4_ H2O (g)  __4__ H2 (g) + __1_ Fe3O4 (s)
SR
9.
__2_ CrCl3 (aq) + __3_ H2S (aq)  Cr2S3 (s) + 6 HCl (aq)
DR
10. __1_ CuSO4•5H2O (s)  __1_ CuSO4 (s) + __5_ H2O (g)
Decomp
11. __16_ Fe (s) + __3_ S8 (s)  8 Fe2S3 (s)
Synthesis
12. __1_ H2S (aq) + __2_ KOH (aq)  K2S (aq) + 2 H2O (l)
Neut
13. __2_ NaF (l)  2 Na (s) + F2 (g)
Decomp
14. __2_ Al (s) + __3_ H2SO4 (aq)  __3__ H2 (g) + __1_ Al2(SO4)3 (aq)
SR
15. __1_ H3PO4 (aq) + __3_ NH4OH (aq)  (NH4)3PO4 (aq) + 3 H2O (l)
Neut
16. __1_ C3H8 (g) + __5_ O2 (g)  3 CO2 (g) + 4 H2O (g)
Combustion
17. __4_ Al (s) + __3_ O2 (g)  2 Al2O3 (s)
Synthesis
18. __2_ C14H30 (s) + __43_ O2 (g)  28 CO2 (g) + 30 H2O (g)
Combustion
MIND BENDERS (Challenge for Chem. nuts!):
Predict, Write and Balance
HNO3  3
Reaction type
1.
3
Cu + 8
2.
3
FeCl2 + 1
3.
2
KMnO4 + 16
HBr  2
MnBr2 + 5
4.
1
K2Cr2O7 + 14
HCl  2
KCl + 2
KNO3 + 4
Cu(NO3)2 + 2
HCl  3
NO + 4
FeCl3 + 1
H2O
NO + 2
Other
H2O + 1 KCl
Other
Br2 + 2
KBr + 8
H2O
Other
CrCl3 + 7
H2O + 3
Cl2
Other