Chemical Equations

Test Review

Diatomic Molecules

1. List the seven diatomic molecules.

Labeling of equationFe(s) + CuSO4(aq) → Fe2(So4)3(aq) + Cu(s)

reactantsyields products

2. Label the parts.

(a) What is meant by the symbol in parentheses following a chemical formula? State of matter

(i) (s) Solid

(ii) (l) Liquid(iii) (g) Gas(iv) (aq) aqueous – dissolved in water

3. Classify the reaction

(a) 2NaCl (aq) + Pb(NO3)2(aq) → PBCL2(s) + 2Na(NO3)(aq)

(b) H2(g) + Cl2(g) → 2HCl(g)

(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)

Double Replacement

Synthesis

Combustion

Single Replacement

Decomposition

4. Add coefficients

to balance the equations

(a) ____Hf + ____N2 → ____Hf3N4

(b) ____Mg + ____H2 SO4 → ____ MgSO4 + ____H2

(c) ____C2H6 + ____ O2 → ____ CO2 + ____ H2O

(d) ____Pb(NO3)2 + ____NaI → ____PbI2 + ____NaNO3

(e) ____Pb(NO3)2 → ____PbO + ____NO2 + ____O2

3 2 1

1111

7

21

2

12

64

1422

• 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

(h) Chlorine gas + sodium metal → sodium chloride

• Write balanced

chemical equations

for each word equations

Cl2 + Na → NaCl

(i) aluminum sulfate + barium chloride → aluminum chloride + barium sulfate

• Write balanced

chemical equations

for each word equations

Al2(SO4)3 + BaCl2 → AlCl3 + BaSO4

(j) beryllium fluoride + magnesium → magnesium fluoride + beryllium

• Write balanced

chemical equations

for each word equations

BeF2 + Mg → MgF2 + Be