Gr 9 NATURAL SCIENCES: CH 2.3 The reaction of iron with oxygen
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Questions and Answers

What is the type of chemical reaction that occurs when iron reacts with oxygen?

  • Decomposition
  • Neutralization
  • Synthesis
  • Combustion (correct)

    • What is the primary component of steel?

  • Zinc
  • Aluminum
  • Copper
  • Iron (correct)

    • Why is steel wool used in experiments to demonstrate the reaction of iron with oxygen?

  • Because it is expensive
  • Because it provides a large surface area (correct)
  • Because it has a small surface area
  • Because it is difficult to obtain

    • What is the color of the sparks produced when iron or steel wool burns?

    <p>Orange</p> Signup and view all the answers

    What is the product of the combustion reaction of iron?

    <p>Iron(III) oxide</p> Signup and view all the answers

    What is the reactant gas present in the air during the combustion reaction of iron?

    <p>Oxygen</p> Signup and view all the answers

    What is the balanced chemical equation for the reaction of iron with oxygen?

    <p>4Fe + 3O₂ → 2Fe₂O₃</p> Signup and view all the answers

    What is the term for the energy released during the combustion reaction of iron?

    <p>Exothermic</p> Signup and view all the answers

    What is the visual effect observed when iron shavings are placed in the flame of a Bunsen burner?

    <p>Visible sparks</p> Signup and view all the answers

    What is the purpose of the combustion reaction of iron?

    <p>To release energy in the form of light and heat</p> Signup and view all the answers

    What happens when iron combines with oxygen from the air?

    <p>It forms iron oxide</p> Signup and view all the answers

    What is the term for the process of iron reacting with oxygen?

    <p>Combustion</p> Signup and view all the answers

    What is the physical state of the iron reactant?

    <p>Solid</p> Signup and view all the answers

    What is the purpose of using steel wool in the experiment?

    <p>To increase the visibility of the reaction</p> Signup and view all the answers

    What is the result of the combustion reaction of iron?

    <p>Energy is released</p> Signup and view all the answers

    What is the role of oxygen in the reaction?

    <p>It is a reactant</p> Signup and view all the answers

    What is the chemical formula for the product of the combustion reaction?

    <p>Fe₂O₃</p> Signup and view all the answers

    What is the ratio of iron to oxygen in the balanced chemical equation?

    <p>4:3</p> Signup and view all the answers

    What can be observed during the combustion reaction of iron?

    <p>Orange sparks</p> Signup and view all the answers

    Why does the combustion reaction of iron release energy?

    <p>Because the reaction is exothermic</p> Signup and view all the answers

    What is the primary characteristic of combustion reactions?

    <p>Releasing energy in the form of light and heat</p> Signup and view all the answers

    Why does the combustion reaction of iron release energy?

    <p>Because the reaction involves the release of light and heat</p> Signup and view all the answers

    What is the purpose of using a Bunsen burner in the experiment?

    <p>To produce a high-temperature flame</p> Signup and view all the answers

    What is the role of the iron in the combustion reaction?

    <p>To react with oxygen to form a solid compound</p> Signup and view all the answers

    What is the result of the combustion reaction of iron in terms of the reactants?

    <p>The iron is oxidized and the oxygen is reduced</p> Signup and view all the answers

    What is the significance of the orange sparks produced during the combustion reaction?

    <p>They indicate the release of energy in the form of light</p> Signup and view all the answers

    Why does the combustion reaction of iron require a large surface area?

    <p>To facilitate the reaction between iron and oxygen</p> Signup and view all the answers

    What is the chemical formula for the reactant iron?

    <p>Fe</p> Signup and view all the answers

    What is the ratio of iron to oxygen in the combustion reaction?

    <p>4:3</p> Signup and view all the answers

    What is the physical state of the product of the combustion reaction?

    <p>Solid</p> Signup and view all the answers

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