CH 18: Understanding the processes and redox reactions taking place in electrolytic cells

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What is the main difference between electrolytic cells and galvanic cells?

Electrolytic cells use external electrical energy to drive non-spontaneous reactions. (correct)

Electrolytic cells generate electrical energy from chemical reactions.

Galvanic cells use external electrical energy to drive non-spontaneous reactions.

Galvanic cells rely on the movement of ions in solution.

In an electrolytic cell, which electrode is positive and why?

The anode is positive as it is connected to the positive pole of the power supply. (correct)

The anode is positive to allow reduction.

The cathode is positive as it is connected to the negative pole of the power supply.

The cathode is positive to allow oxidation.

What occurs at the cathode in an electrolytic cell?

Cations move towards it.

Oxidation takes place.

Reduction takes place. (correct)

Anions move towards it.

What happens to cations and anions in an electrolytic cell?

Cations move towards the anode, anions towards the cathode. Signup and view all the answers

What is the purpose of electroplating?

To deposit a layer of metal onto an object. Signup and view all the answers

In the electroplating of an iron spoon with silver, what serves as the cathode where silver ions are reduced and deposited?

The iron spoon Signup and view all the answers

In the refining of copper through electrolysis, what happens at the anode?

Impure copper is oxidized, releasing copper ions Signup and view all the answers

Which of the following is produced during the electrolysis of a concentrated sodium chloride solution (brine)?

Chlorine gas, hydrogen gas, and sodium hydroxide Signup and view all the answers

What is the purpose of schematic diagrams in the context of electrolysis processes?

Both (a) and (b) Signup and view all the answers

Which of the following statements best describes the importance of understanding electrolytic cells?

It helps comprehend their widespread applications in modern technology and industry Signup and view all the answers

What is the purpose of electroplating an iron spoon with silver?

To provide a silver coating for desirable appearance or corrosion resistance Signup and view all the answers

In the electrolysis of sodium chloride, what is produced at the cathode?

Hydrogen gas Signup and view all the answers

What happens to impure copper during the refining process using electrolysis?

It serves as the anode and deposits at the cathode as pure copper Signup and view all the answers

What is the role of mercury, diaphragm, and membrane cells in the electrolysis of sodium chloride?

Each provides a specific configuration for the chlor-alkali industry Signup and view all the answers

What is one of the benefits of using schematic diagrams in understanding electrolysis processes?

To simplify the principles behind electrolytic cells Signup and view all the answers

Which process ensures the production of high-purity copper?

Refining of Copper using electrolysis Signup and view all the answers

What is transferred from the impure anode to the cathode during copper refining?

$Cu$ atoms Signup and view all the answers

Why is it important to understand electrolytic cells in modern technology and industry?

To highlight their significance in various applications Signup and view all the answers

What does each specific configuration of mercury, diaphragm, and membrane cells provide in the chlor-alkali industry?

Each offers unique advantages for sodium chloride electrolysis Signup and view all the answers

What role does pure copper play in the refining process where impure copper serves as the anode?

Pure copper is deposited at the cathode. Signup and view all the answers

What type of energy is used to drive non-spontaneous chemical reactions in electrolytic cells?

External electrical energy Signup and view all the answers

In an electrolytic cell, where do cations move towards?

Cathode Signup and view all the answers

What is the product formed at the anode during the electrolysis of copper(II) chloride?

$Cl_2$ Signup and view all the answers

What is deposited at the cathode during the electrolysis of copper(II) chloride?

$Cu$ Signup and view all the answers

In electroplating, what process involves depositing a layer of metal onto an object?

Electrodeposition Signup and view all the answers

Which electrode in an electrolytic cell is connected to the negative pole of the power supply?

Cathode Signup and view all the answers

What drives electrons flow from the anode to the cathode in an electrolytic cell?

$e^-$ flow in the external circuit Signup and view all the answers

During the decomposition of copper(II) chloride into copper metal and chlorine gas, what happens at the cathode?

$Cu^{2+}$ gains electrons Signup and view all the answers

$CuCl_2$ decomposes into chlorine gas and copper at different locations in an electrolytic cell. Where does this decomposition occur?

At both the anode and cathode Signup and view all the answers

What is one major difference between galvanic cells and electrolytic cells based on the provided information?

Galvanic cells involve spontaneous redox reactions, while electrolytic cells involve non-spontaneous redox reactions. Signup and view all the answers

What is the purpose of using sodium hydroxide in the electrolysis of sodium chloride?

To neutralize the solution Signup and view all the answers

In the electrolytic cell for refining copper, what is the purpose of impure copper serving as the anode?

To oxidize into copper ions Signup and view all the answers

What is the role of a membrane cell in the electrolysis of sodium chloride?

To separate the anode and cathode compartments Signup and view all the answers

How does the electrolysis of brine in the chlor-alkali industry contribute to environmental impacts?

Generates toxic fumes Signup and view all the answers

Why is it crucial for impurities to remain at the anode during the copper refining process?

To ensure a high-purity copper deposit Signup and view all the answers

What is a significant consequence of using mercury cells in the electrolysis of sodium chloride?

Mercury poisoning Signup and view all the answers

In the production of high-purity copper through electrolysis, what is one potential hazard associated with working with impure copper?

Elevated levels of heavy metal exposure Signup and view all the answers

What is a primary reason for using diaphragm cells in the electrolysis of sodium chloride?

To prevent mixing of cathode and anode products Signup and view all the answers

What is the purpose of the anode in an electrolytic cell?

To cause oxidation Signup and view all the answers

During the electrolysis of copper(II) chloride, what is the role of Cl⁻ ions?

Move towards anode Signup and view all the answers

What is the overall cell reaction during the decomposition of copper(II) chloride in an electrolytic cell?

CuCl₂ → Cl₂ + Cu Signup and view all the answers

In an electrolytic cell, which electrode is connected to the negative pole of the power supply?

Cathode Signup and view all the answers

What happens to copper ions during the electrolysis of copper(II) chloride?

Undergo reduction at the cathode Signup and view all the answers

Which electrode in an electrolytic cell attracts anions?

Anode Signup and view all the answers

What drives cations towards the cathode in an electrolytic cell?

Movement of Cl⁻ ions Signup and view all the answers

In an electrolytic cell, what flows through the external circuit?

$e^-$ from anode to cathode Signup and view all the answers

What is the role of electrons in an electrolytic cell?

Facilitate oxidation at the anode Signup and view all the answers

What is the primary function of cations in an electrolytic cell?

Facilitate reduction Signup and view all the answers

CH 18: Understanding the processes and redox reactions taking place in electrolytic cells

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Questions and Answers

What is the main difference between electrolytic cells and galvanic cells?

In an electrolytic cell, which electrode is positive and why?

What occurs at the cathode in an electrolytic cell?

What happens to cations and anions in an electrolytic cell?

What is the purpose of electroplating?

In the electroplating of an iron spoon with silver, what serves as the cathode where silver ions are reduced and deposited?

In the refining of copper through electrolysis, what happens at the anode?

Which of the following is produced during the electrolysis of a concentrated sodium chloride solution (brine)?

What is the purpose of schematic diagrams in the context of electrolysis processes?

Which of the following statements best describes the importance of understanding electrolytic cells?

What is the purpose of electroplating an iron spoon with silver?

In the electrolysis of sodium chloride, what is produced at the cathode?

What happens to impure copper during the refining process using electrolysis?

What is the role of mercury, diaphragm, and membrane cells in the electrolysis of sodium chloride?

What is one of the benefits of using schematic diagrams in understanding electrolysis processes?

Which process ensures the production of high-purity copper?

What is transferred from the impure anode to the cathode during copper refining?

Why is it important to understand electrolytic cells in modern technology and industry?

What does each specific configuration of mercury, diaphragm, and membrane cells provide in the chlor-alkali industry?

What role does pure copper play in the refining process where impure copper serves as the anode?

What type of energy is used to drive non-spontaneous chemical reactions in electrolytic cells?

In an electrolytic cell, where do cations move towards?

What is the product formed at the anode during the electrolysis of copper(II) chloride?

What is deposited at the cathode during the electrolysis of copper(II) chloride?

In electroplating, what process involves depositing a layer of metal onto an object?

Which electrode in an electrolytic cell is connected to the negative pole of the power supply?

What drives electrons flow from the anode to the cathode in an electrolytic cell?

During the decomposition of copper(II) chloride into copper metal and chlorine gas, what happens at the cathode?

$CuCl_2$ decomposes into chlorine gas and copper at different locations in an electrolytic cell. Where does this decomposition occur?

What is one major difference between galvanic cells and electrolytic cells based on the provided information?

What is the purpose of using sodium hydroxide in the electrolysis of sodium chloride?

In the electrolytic cell for refining copper, what is the purpose of impure copper serving as the anode?

What is the role of a membrane cell in the electrolysis of sodium chloride?

How does the electrolysis of brine in the chlor-alkali industry contribute to environmental impacts?

Why is it crucial for impurities to remain at the anode during the copper refining process?

What is a significant consequence of using mercury cells in the electrolysis of sodium chloride?

In the production of high-purity copper through electrolysis, what is one potential hazard associated with working with impure copper?

What is a primary reason for using diaphragm cells in the electrolysis of sodium chloride?

What is the purpose of the anode in an electrolytic cell?

During the electrolysis of copper(II) chloride, what is the role of Cl⁻ ions?

What is the overall cell reaction during the decomposition of copper(II) chloride in an electrolytic cell?

In an electrolytic cell, which electrode is connected to the negative pole of the power supply?

What happens to copper ions during the electrolysis of copper(II) chloride?

Which electrode in an electrolytic cell attracts anions?

What drives cations towards the cathode in an electrolytic cell?

In an electrolytic cell, what flows through the external circuit?

What is the role of electrons in an electrolytic cell?

What is the primary function of cations in an electrolytic cell?

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