Select The Correct Answer.What Reaction Is Depicted By The Given Equation: A U 3 + + 3 E − → A U Au^{3+} + 3 E^{-} \rightarrow Au A U 3 + + 3 E − → A U A. Oxidation B. Reduction C. Combustion D. Replacement E. Neutralization

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Introduction

Chemical reactions are a fundamental concept in chemistry, and understanding the different types of reactions is crucial for solving various problems in the field. In this article, we will focus on identifying the correct answer for a given chemical equation, specifically the reaction depicted by the equation Au3++3e−→AuAu^{3+} + 3 e^{-} \rightarrow Au. We will explore the different types of chemical reactions, including oxidation, reduction, combustion, replacement, and neutralization, to determine the correct answer.

Types of Chemical Reactions

Oxidation

Oxidation is a chemical reaction in which a substance loses one or more electrons, resulting in an increase in oxidation state. This type of reaction is often accompanied by a gain of oxygen or a loss of hydrogen. Oxidation is typically denoted by the addition of oxygen or the removal of hydrogen from the reactant.

Reduction

Reduction is a chemical reaction in which a substance gains one or more electrons, resulting in a decrease in oxidation state. This type of reaction is often accompanied by a gain of hydrogen or a loss of oxygen. Reduction is typically denoted by the addition of hydrogen or the removal of oxygen from the reactant.

Combustion

Combustion is a type of oxidation reaction that involves the reaction of a substance with oxygen, resulting in the release of heat and light. Combustion reactions typically involve the reaction of a fuel with oxygen, resulting in the formation of carbon dioxide and water.

Replacement

Replacement is a type of chemical reaction in which one element is replaced by another element in a compound. This type of reaction is often denoted by the exchange of one element for another in a compound.

Neutralization

Neutralization is a type of chemical reaction in which an acid reacts with a base to form a salt and water. This type of reaction is often denoted by the reaction of an acid with a base to form a neutral solution.

Analyzing the Given Equation

The given equation is Au3++3e−→AuAu^{3+} + 3 e^{-} \rightarrow Au. To determine the correct answer, we need to analyze the equation and identify the type of reaction that is occurring.

Identifying the Oxidation State

The oxidation state of gold (Au) in the given equation is +3 in the reactant and 0 in the product. This indicates that the oxidation state of gold is decreasing, which is a characteristic of a reduction reaction.

Identifying the Type of Reaction

Based on the analysis of the oxidation state, we can conclude that the given equation represents a reduction reaction. In a reduction reaction, a substance gains one or more electrons, resulting in a decrease in oxidation state. In this case, the gold ion (Au^{3+}) gains three electrons to form a neutral gold atom (Au).

Conclusion

In conclusion, the correct answer for the given equation Au3++3e−→AuAu^{3+} + 3 e^{-} \rightarrow Au is B. reduction. This is because the equation represents a reduction reaction, in which the gold ion gains three electrons to form a neutral gold atom.

Key Takeaways

  • Oxidation is a chemical reaction in which a substance loses one or more electrons, resulting in an increase in oxidation state.
  • Reduction is a chemical reaction in which a substance gains one or more electrons, resulting in a decrease in oxidation state.
  • Combustion is a type of oxidation reaction that involves the reaction of a substance with oxygen, resulting in the release of heat and light.
  • Replacement is a type of chemical reaction in which one element is replaced by another element in a compound.
  • Neutralization is a type of chemical reaction in which an acid reacts with a base to form a salt and water.

Practice Problems

  1. What type of reaction is represented by the equation Cu2++2e−→CuCu^{2+} + 2 e^{-} \rightarrow Cu?
  2. What type of reaction is represented by the equation H2+O2→H2OH_{2} + O_{2} \rightarrow H_{2}O?
  3. What type of reaction is represented by the equation Na+Cl2→NaClNa + Cl_{2} \rightarrow NaCl?

Answer Key

  1. B. reduction
  2. C. combustion
  3. D. replacement

Introduction

Chemical reactions are a fundamental concept in chemistry, and understanding the different types of reactions is crucial for solving various problems in the field. In this article, we will focus on answering some common questions related to chemical reactions, including oxidation, reduction, combustion, replacement, and neutralization.

Q&A

Q1: What is the difference between oxidation and reduction?

A1: Oxidation is a chemical reaction in which a substance loses one or more electrons, resulting in an increase in oxidation state. Reduction, on the other hand, is a chemical reaction in which a substance gains one or more electrons, resulting in a decrease in oxidation state.

Q2: What is an example of a combustion reaction?

A2: An example of a combustion reaction is the reaction of methane (CH4) with oxygen (O2) to form carbon dioxide (CO2) and water (H2O). The equation for this reaction is: CH4 + 2O2 → CO2 + 2H2O.

Q3: What is an example of a replacement reaction?

A3: An example of a replacement reaction is the reaction of sodium (Na) with chlorine (Cl2) to form sodium chloride (NaCl). The equation for this reaction is: 2Na + Cl2 → 2NaCl.

Q4: What is an example of a neutralization reaction?

A4: An example of a neutralization reaction is the reaction of hydrochloric acid (HCl) with sodium hydroxide (NaOH) to form sodium chloride (NaCl) and water (H2O). The equation for this reaction is: HCl + NaOH → NaCl + H2O.

Q5: What is the difference between a strong acid and a weak acid?

A5: A strong acid is an acid that completely dissociates in water to form hydrogen ions (H+), whereas a weak acid is an acid that only partially dissociates in water to form hydrogen ions.

Q6: What is the difference between a strong base and a weak base?

A6: A strong base is a base that completely dissociates in water to form hydroxide ions (OH-), whereas a weak base is a base that only partially dissociates in water to form hydroxide ions.

Q7: What is the equation for the reaction of iron (Fe) with oxygen (O2) to form iron(III) oxide (Fe2O3)?

A7: The equation for this reaction is: 4Fe + 3O2 → 2Fe2O3.

Q8: What is the equation for the reaction of calcium (Ca) with chlorine (Cl2) to form calcium chloride (CaCl2)?

A8: The equation for this reaction is: 2Ca + Cl2 → 2CaCl2.

Q9: What is the equation for the reaction of ammonia (NH3) with oxygen (O2) to form nitrogen (N2) and water (H2O)?

A9: The equation for this reaction is: 4NH3 + 5O2 → 4NO + 6H2O.

Q10: What is the equation for the reaction of hydrogen (H2) with oxygen (O2) to form water (H2O)?

A10: The equation for this reaction is: 2H2 + O2 → 2H2O.

Conclusion

In conclusion, understanding the different types of chemical reactions is crucial for solving various problems in chemistry. By answering the questions above, we have gained a better understanding of the basics of chemical reactions, including oxidation, reduction, combustion, replacement, and neutralization.

Key Takeaways

  • Oxidation is a chemical reaction in which a substance loses one or more electrons, resulting in an increase in oxidation state.
  • Reduction is a chemical reaction in which a substance gains one or more electrons, resulting in a decrease in oxidation state.
  • Combustion is a type of oxidation reaction that involves the reaction of a substance with oxygen, resulting in the release of heat and light.
  • Replacement is a type of chemical reaction in which one element is replaced by another element in a compound.
  • Neutralization is a type of chemical reaction in which an acid reacts with a base to form a salt and water.

Practice Problems

  1. What type of reaction is represented by the equation Cu2++2e−→CuCu^{2+} + 2 e^{-} \rightarrow Cu?
  2. What type of reaction is represented by the equation H2+O2→H2OH_{2} + O_{2} \rightarrow H_{2}O?
  3. What type of reaction is represented by the equation Na+Cl2→NaClNa + Cl_{2} \rightarrow NaCl?

Answer Key

  1. B. reduction
  2. C. combustion
  3. D. replacement