idk Flashcards
What is electrochemistry?
The branch of chemistry that deals with the relationship between electrical energy and chemical reactions.
True or False: In electrochemistry, oxidation involves the gain of electrons.
False
What is the standard electrode potential (E°)?
The measure of the individual potential of a reversible electrode at standard state conditions.
Fill in the blank: The process of converting chemical energy into electrical energy is known as __________.
electrochemical cell operation
What is a galvanic cell?
A type of electrochemical cell that generates electrical energy from spontaneous chemical reactions.
What is the Nernst equation used for?
To calculate the cell potential under non-standard conditions.
Multiple choice: Which of the following is a component of an electrolytic cell? A) Anode B) Cathode C) Electrolyte D) All of the above
D) All of the above
What happens at the anode during an electrochemical reaction?
Oxidation occurs.
True or False: In a galvanic cell, the anode is positively charged.
False
What is Faraday’s law of electrolysis?
The amount of substance produced at an electrode during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte.
Fill in the blank: The reduction half-reaction occurs at the __________.
cathode
What is the significance of the salt bridge in an electrochemical cell?
It maintains electrical neutrality by allowing the flow of ions between the two half-cells.
Multiple choice: Which of the following is a common application of electrochemistry? A) Batteries B) Electroplating C) Fuel cells D) All of the above
D) All of the above
What is the difference between a primary cell and a secondary cell?
A primary cell cannot be recharged, while a secondary cell can be recharged and reused.
What does the term ‘electrolyte’ refer to?
A substance that conducts electricity when dissolved in water or molten.
True or False: In an electrolytic cell, electrical energy is used to drive a non-spontaneous reaction.
True
What is the role of the cathode in an electrochemical cell?
It is the electrode where reduction occurs.
Fill in the blank: The standard cell potential (E°cell) can be calculated using the formula __________.
E°cell = E°cathode - E°anode
What is corrosion in electrochemistry?
The deterioration of a material, usually a metal, due to electrochemical reactions with its environment.
Multiple choice: Which of the following metals is most commonly used in batteries? A) Copper B) Lead C) Zinc D) Gold
B) Lead
What is the purpose of a potentiometer in electrochemistry?
To measure the voltage of an electrochemical cell.
True or False: The higher the standard electrode potential, the stronger the oxidizing agent.
True
What is the function of a reference electrode?
To provide a stable and known electrode potential against which other electrodes can be measured.
Fill in the blank: The electrochemical series lists elements in order of their __________.
standard electrode potentials
What is the significance of the Gibbs free energy change (ΔG) in electrochemistry?
It indicates the spontaneity of a reaction; a negative ΔG means the reaction is spontaneous.
Multiple choice: Which of the following is NOT a characteristic of a good battery? A) High energy density B) Low self-discharge C) High cost D) Long cycle life
C) High cost
