1. Which of the following equations are balanced?
|
Question |
Answer |
|
(a) Na + H2O ---> NaOH + H2 |
NOT BALANCED |
|
(b) K2O + H2O ---> 2 KOH |
BALANCED |
|
(c) K + Br2 ---> KBr |
NOT BALANCED |
|
(d) H2SO4 + NaCl ---> 2 HCl + Na2SO4 |
NOT BALANCED |
|
(e) N2 + H2 ---> 2 NH3 |
NOT BALANCED |
|
(f) HNO3 + A1(OH)3 ---> H2O + A1(NO3)3 |
NOT BALANCED |
2. Balance these equations. (Coefficients are in bold for the balanced equation).
(a) K2O + H2O ---> 2 KOH
(b) A1(NO3)3 + 3 NaOH ---> A1(OH)3 + 3 NaNO3
(c) H2SO4 + BaCl2 ---> BaSO4 + 2 HCl
(d) Ni + 2 HNO3 ---> Ni(NO3)2 + H2
(e) 2 NH3 + H2SO4 ---> (NH4)2SO4
(f) CaCl2 + Na2CO3 ---> CaCO3 + 2 NaCl
(g) K2CO3 + 2 HCl ---> 2 KCl + H2O + CO2
(h) (NH4)2CO3 + 2 NaOH ---> 2 NH3 + Na2CO3 + 2 H2O
(i) P4O10 + 6 H2O ---> 4 H3PO4
(j) 2 KClO3 ---> 2 KCl + 3 O2
(k) C3H8 + 5 O2 ---> 3 CO2 + 4 H2O
(l) sodium hydroxide + copper (II) sulfate ---> copper (II) hydroxide + sodium sulfate
2 NaOH + CuSO4 ---> Cu(OH)2 + Na2SO4
(m) sodium phosphate + calcium chloride ---> sodium chloride + calcium phosphate
2 Na3PO4 + 3 CaCl2 ---> Ca3(PO4)2 + 6 NaCl
(n) iron(III) perchlorate + barium hydroxide ---> barium perchlorate + iron(III) hydroxide
2 Fe(ClO4)3 + 3 Ba(OH)2 ---> 3 Ba(ClO4)2 + 2 Fe(OH)3
(o) sodium acetate + hydrogen chloride ---> sodium chloride + acetic acid
NaCH3CO2 + HCl ---> NaCl + HCH3CO2
3. Write balanced equations to show how the following compounds are produced from their elements. Elemental hydrogen, fluorine, chlorine, bromine, iodine, oxygen, and nitrogen are H2, F2, Cl2, Br2, I2, O2, and N2; elemental white phosphorus is P4; elemental sulfur is S8.
|
Question |
Answer |
|
(a) AsF5 |
2 As + 5 F2 ---> 2 AsF5 |
|
(b) SO3 |
S8 + 12 O2 ---> 8 SO3 |
|
(c) NO |
N2 + O2 ---> 2 NO |
|
(d) Al2O3 |
4 Al + 3 O2 ---> 2 Al2O3 |
|
(e) MgS |
8 Mg + S8 ---> 8 MgS |
|
(f) Ag2S |
16 Ag + S8 ---> 8 Ag2S |
|
(g) CrI3 |
2 Cr + 3 I2 ---> 2 CrI3 |
|
(h) Li3N |
6 Li + N2 ---> 2 Li3N |
|
(i) P4O10 |
P4 + 5 O2 ---> P4O10 |
|
(j) NaH |
2 Na + H2 ---> 2 NaH |
|
(k) Li2O |
4 Li + O2 ---> 2 Li2O |
|
(l) FeS |
8 Fe + S8 ---> 8 FeS |
|
(m) Mg3P2 |
6 Mg + P4 ---> 2 Mg3P2 |
|
(n) NH3 |
N2 + 3 H2 ---> 2 NH3 |
|
(o) HF |
H2 + F2 ---> 2 HF |
|
(p) ClO2 |
Cl2 + 2 O2 ---> 2 ClO2 |
This page is
http://chemiris.labs.brocku.ca/~chemweb/courses/chem180/Study_Guide_Ans_Pt4.html
Created October 1, 2000 by M. F. Richardson
© Brock University, 2000