Combination Reactions
Chemistry ⇒ Chemical Reactions and Equations
Combination Reactions starts at 7 and continues till grade 12.
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Describe the difference between a combination reaction and a decomposition reaction.
Describe the energy changes that can occur during a combination reaction.
Describe what happens when magnesium burns in air.
Explain why combination reactions are important in industry.
Explain why the reaction between calcium oxide and water is considered a combination reaction.
State whether the following reaction is a combination reaction: 2H2O → 2H2 + O2
State whether the following reaction is a combination reaction: 2K + 2H2O → 2KOH + H2
State whether the following reaction is a combination reaction: CaO + CO2 → CaCO3
Which of the following is a balanced equation for a combination reaction?
(1) 2KClO3 → 2KCl + 3O2
(2) 2H2 + O2 → 2H2O
(3) CaCO3 → CaO + CO2
(4) 2NaCl → 2Na + Cl2
Which of the following is a characteristic of combination reactions?
(1) They always absorb heat
(2) They always produce more than one product
(3) They involve the combination of two or more reactants to form a single product
(4) They always require a catalyst
Which of the following is a combination reaction involving a non-metal and oxygen?
(1) S + O2 → SO2
(2) 2KClO3 → 2KCl + 3O2
(3) 2Na + Cl2 → 2NaCl
(4) CaCO3 → CaO + CO2
Which of the following is a combination reaction?
(1) 2CO + O2 → 2CO2
(2) 2KClO3 → 2KCl + 3O2
(3) 2NaCl → 2Na + Cl2
(4) CaCO3 → CaO + CO2
A combination reaction always results in the formation of a ______ product.
Fill in the blank: In a combination reaction, two or more substances combine to form a ______ product.
Fill in the blank: The reaction between aluminum and chlorine to form aluminum chloride is a ______ reaction.
Fill in the blank: The reaction between carbon and oxygen to form carbon dioxide is a ______ reaction.
Is the reaction between hydrogen and chlorine to form hydrogen chloride a combination reaction? (Yes/No)
State whether the following reaction is a combination reaction: 2H2O → 2H2 + O2
State whether the following reaction is a combination reaction: 2K + 2H2O → 2KOH + H2
State whether the following reaction is a combination reaction: CaO + CO2 → CaCO3
