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Chemical Equations
Test Review
1. List the seven diatomic
molecules.
Diatomic Molecules
2. Label the parts.
Labeling of equation
Fe(s) + CuSO4(aq)
→
yields
reactants
Fe2(So4)3(aq) + Cu(s)
products
(a) What is meant by the symbol in
parentheses following a chemical
formula?
State of matter
(i)
(ii)
(iii)
(iv)
(s) Solid
(l) Liquid
(g) Gas
(aq) aqueous – dissolved in water
3. Classify the reaction
(a) 2NaCl (aq) + Pb(NO3)2(aq) → PBCL2(s) + 2Na(NO3)(aq)
Double Replacement
(b) H2(g) + Cl2(g) → 2HCl(g)
Synthesis
(c) C2H8(g) + 4O2(g) →2CO2(g) + 4H2O(g)
(d) 2Li(s) + 2H2O (l ) → 2LiOH(aq) + H2(g)
(e) 2KNO3(s) → 2KNO2(s) + O2(g)
Combustion
Single Replacement
Decomposition
4. Add coefficients
to balance the equations
2 2 → ____Hf
3 Hf + ____N
1 3N4
(a) ____
1
1 2 SO4 → ____
1 MgSO4 + ____H
1 2
(b) ____Mg
+ ____H
2 C2H6 + ____
7 O2 → ____
4 CO2 + ____
6 H 2O
(c) ____
1 Pb(NO3)2 + ____NaI
2
1 2 + ____NaNO
2
(d) ____
→ ____PbI
3
2 Pb(NO3)2 → ____PbO
2
4 2 + ____O
1 2
(e) ____
+ ____NO
• Write balanced
chemical equations
for each word equations
(a) potassium chloride + silver nitrate → potassium nitrate+ silver chloride
KCl + AgNO3 → KNO3 + AgCl
• Write balanced
chemical equations
for each word equations
(b) aluminum hydroxide + sodium nitrate → aluminum nitrate + sodium hydroxide
Al(OH)3 + NaNO3 → Al(NO3)3 + NaOH
• Write balanced
chemical equations
for each word equations
(c) iron metal + copper (II) sulfate → iron (II) sulfate + copper metal
Fe + CuSO4 → FeSO4 + Cu
• Write balanced
chemical equations
for each word equations
(d) Aluminum metal + copper (II) chloride → aluminum chloride + copper
metal
Al+ CuCl2 → AlCl3 + Cu
• Write balanced
chemical equations
for each word equations
(e) Sodium chlorate → sodium chloride + oxygen gas
NaClO3 → NaCl + O2
• Write balanced
chemical equations
for each word equations
(f) calcium carbonate → calcium oxide + carbon dioxide gas
Ca(CO3 )→ CaO + CO2
• Write balanced
chemical equations
for each word equations
(g) zinc metal + oxygen gas → zinc oxide
Zn + O2 → ZnO
• Write balanced
chemical equations
for each word equations
(h) Chlorine gas + sodium metal → sodium chloride
Cl2 + Na → NaCl
• Write balanced
chemical equations
for each word equations
(i) aluminum sulfate + barium chloride → aluminum chloride + barium sulfate
Al2(SO4)3 + BaCl2 → AlCl3 + BaSO4
• Write balanced
chemical equations
for each word equations
(j) beryllium fluoride + magnesium → magnesium fluoride + beryllium
BeF2 + Mg → MgF2 + Be