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Questions and Answers
What is the main type of process involved in the corrosion of metallic materials?
What is the main type of process involved in the corrosion of metallic materials?
- Optical
- Mechanical
- Electrochemical (correct)
- Thermal
In a galvanic cell, what occurs at the anode?
In a galvanic cell, what occurs at the anode?
- Reduction
- Oxidation (correct)
- Hydration
- Evaporation
What are the two components required to form a galvanic cell?
What are the two components required to form a galvanic cell?
- Electrical insulators
- Metallic alloys
- Chemical precipitates
- Electrodes and an electrolyte (correct)
How is electrochemical corrosion of metals defined?
How is electrochemical corrosion of metals defined?
In an electrochemical system, what must occur between the anode and cathode?
In an electrochemical system, what must occur between the anode and cathode?
What chemical process takes place at the cathode in a galvanic cell?
What chemical process takes place at the cathode in a galvanic cell?
What is a half-cell with a pure metal electrode immersed in a 1M solution of its ions at 25°C called?
What is a half-cell with a pure metal electrode immersed in a 1M solution of its ions at 25°C called?
In the Nernst equation, what does 'n' represent?
In the Nernst equation, what does 'n' represent?
What does the negative value of Gibbs free energy (ΔG) indicate?
What does the negative value of Gibbs free energy (ΔG) indicate?
What does the standard-state free energy refer to in electrochemical effects?
What does the standard-state free energy refer to in electrochemical effects?
Which electrode is commonly used as a reference electrode in electrochemical studies?
Which electrode is commonly used as a reference electrode in electrochemical studies?
What does the Nernst equation express in relation to a cell?
What does the Nernst equation express in relation to a cell?
What is the term used to describe the electric potential between two cell halves?
What is the term used to describe the electric potential between two cell halves?
At what temperature was the potential of 0.780 V measured for a copper–iron galvanic cell?
At what temperature was the potential of 0.780 V measured for a copper–iron galvanic cell?
What does the magnitude of a voltage represent in electrochemical oxidation–reduction reactions?
What does the magnitude of a voltage represent in electrochemical oxidation–reduction reactions?
Which term is used to rate metallic materials based on their tendency to experience oxidation when coupled to other metals in solutions of their respective ions?
Which term is used to rate metallic materials based on their tendency to experience oxidation when coupled to other metals in solutions of their respective ions?
Which instrument can be used to determine the magnitude of the electric potential between two cell halves?
Which instrument can be used to determine the magnitude of the electric potential between two cell halves?
What is the driving force for electrochemical oxidation–reduction reactions?
What is the driving force for electrochemical oxidation–reduction reactions?
Which equation represents the reduction reaction in the electrochemical corrosion of metals?
Which equation represents the reduction reaction in the electrochemical corrosion of metals?
What is the name of the reaction in which zinc valence increases from 0 to +2, liberating electrons?
What is the name of the reaction in which zinc valence increases from 0 to +2, liberating electrons?
What is the role of the electrolytic conductor in an electrochemical cell?
What is the role of the electrolytic conductor in an electrochemical cell?
Which component in an electrochemical cell is the site of oxidation?
Which component in an electrochemical cell is the site of oxidation?
What is the term used to describe the corrosion that involves the movement of ions in the electrolytic conductor?
What is the term used to describe the corrosion that involves the movement of ions in the electrolytic conductor?
Which reaction represents the oxidation of zinc in the electrochemical corrosion of metals?
Which reaction represents the oxidation of zinc in the electrochemical corrosion of metals?
What happens to the corrosion rate of steel when fine precipitated n-carbide and cementite occur?
What happens to the corrosion rate of steel when fine precipitated n-carbide and cementite occur?
At what temperature does cementite merge with other particles, leading to a reduction in corrosion rate?
At what temperature does cementite merge with other particles, leading to a reduction in corrosion rate?
What is the anode reaction in a Salt Concentration Cell?
What is the anode reaction in a Salt Concentration Cell?
What is the cathode reaction in a Differential Aeration Cell?
What is the cathode reaction in a Differential Aeration Cell?
What causes the pipe in sandy soil to corrode more?
What causes the pipe in sandy soil to corrode more?
Where are Differential Temperature Cells typically found?
Where are Differential Temperature Cells typically found?
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