Textbook Question
Elemental phosphorus exists as molecules of P4. It reacts with Cl2(g) to produce phosphorus pentachloride.Write the balanced chemical equation for this reaction.
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7. Chemical Reactions
Types of Chemical Reactions
Multiple Choice
Indicate the type of chemical reaction taking place from the following equation:
A
Combination
B
Combustion
C
Single Displacement
D
Decomposition
Verified step by step guidance1
Identify the reactants and products in the chemical equation. The reactants are magnesium (Mg) and iron(III) oxide (Fe₂O₃), and the products are iron (Fe) and magnesium oxide (MgO).
Recognize the type of chemical reaction by analyzing the changes in the reactants and products. In this equation, magnesium replaces iron in iron(III) oxide, forming magnesium oxide and releasing iron.
Understand that a single displacement reaction involves an element reacting with a compound, where the element displaces another element in the compound. Here, Mg displaces Fe from Fe₂O₃.
Note that in single displacement reactions, a more reactive element displaces a less reactive element from its compound. Magnesium is more reactive than iron, which is why it can displace iron from iron(III) oxide.
Conclude that the given chemical equation represents a single displacement reaction, as magnesium displaces iron from iron(III) oxide to form magnesium oxide and iron.
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