1. Colegio San Patricio
Name _____________________________________ Date ___________________
TYPE A
1.- Classify the following reactions as exothermic or endothermic
a) N2 + O2 + E  NO
b) H2 + N2  NH3 + E
2.- Rewrite the following as chemical equation:
a) Aluminum oxide reacts with carbon to form aluminum metal and carbon dioxide
gas
b) Aqueous solutions of K2SO4 and barium chloride react to form a precipitate of
BaSO4 and a solution of potassium chloride
c) Calcium carbonate (CaCO3) decomposes when burned to produce carbon
dioxide gas and calcium oxide solid
d) Hydrogen peroxide (H2O2) decomposes in presence of MnO2 as a catalyst to
form liquid water and oxygen gas
3.- Name the following compounds.
a) NaHCO3 c) Ca(NO3)2
b) K2SO4 d) Al(C2H3O2)3
Colegio San Patricio
Name _____________________________________ Date ___________________
TYPE B
1.- Classify the following reactions as exothermic or endothermic
a) SO2 + O2  SO3 + E
b) CaCO3 + E  CaO + CO2
2.- Rewrite the following as chemical equation:
a) Nitrogen monoxide gas and oxygen gas react to form nitrogen dioxide gas
b) Carbon monoxide gas and oxygen gas react in the presence of platinum as a catalyst
to form carbon dioxide gas.
c) Solutions of AgNO3 and potassium chloride react to form a solution of KNO3 and a
precipitate of AgCl
d) C2H2 burns with oxygen gas to form carbon dioxide gas and water vapor
3.- Name the following compounds.
a) MgCO3 c) Li2Cr2O7
b) Na2SO3 d) KCN

2. Colegio San Patricio
Name _____________________________________ Date ___________________
TYPE C
1.- Classify the following reactions as exothermic or endothermic
a) KClO3 + E  KCl + O2
b) H2 + N2  NH3 + E
2.- Rewrite the following as chemical equation:
e) Aqueous solutions of KOH and FeCl3 react to form a precipitate of Fe(OH)3 and
a solution of potassium chloride
f) Magnesium carbonate (MgCO3) decomposes when burned to produce carbon
dioxide gas and magnesium oxide solid
g) Hydrogen peroxide (H2O2) decomposes in presence of MnO2 as a catalyst to
form liquid water and oxygen gas
h) Phosphorus reacts with liquid bromine to produce aluminum bromide
3.- Name the following compounds.
a) KHCO3 c) MgNO3
b) Li2SO4 d) Ba(C2H3O2)2
Colegio San Patricio
Name _____________________________________ Date ___________________
TYPE D
1.- Classify the following reactions as exothermic or endothermic
a) SO2 + O2  SO3 + E
b) CaCO3 + E  CaO + CO2
2.- Rewrite the following as chemical equation:
a) Nitrogen dioxide gas and liquid water react to form HNO3 solution and nitrogen
monoxide gas
b) Carbon monoxide gas and oxygen gas react in the presence of platinum as a catalyst
to form carbon dioxide gas.
c) Aqueous solutions of KOH and FeCl3 react to form a precipitate of Fe(OH)3 and a
solution of potassium chloride
d) Calcium carbonate (CaCO3) decomposes when burned to produce carbon dioxide gas
and calcium oxide solid
3.- Name the following compounds.
a) CaCO3 c) K2Cr2O7
b) Li2SO3 d) Al(OH)3