Question

oxidation-reduction processes

dry cell battery
my definition:

electrochemical cell
my definition:

electrolysis
my definition:

electrolyte
my definition:

electroplating
my definition:

galvanic cell
my definition:

redox couple
my definition:

sacrificial anode
my definition:

salt bridge
my definition:

spontaneous reaction
my definition:

standard cell potential
my definition:

standard hydrogen electrode
my definition:

standard reduction potential
my definition:

voltage
my definition:

Explanation:

Define dry cell battery and electrochemical cell

Using the Electrochemistry knowledge point:

• Dry cell battery: A portable electrochemical cell with a low-moisture paste electrolyte rather than a liquid.
• Electrochemical cell: A device that generates electricity from chemical reactions or uses electricity to drive reactions.

Define electrolysis and electrolyte

Using the Electrolysis knowledge point:

• Electrolysis: The process of using electrical energy to force a non-spontaneous chemical reaction to occur.
• Electrolyte: A substance containing free ions that conducts electricity when dissolved in water or molten.

Define electroplating and galvanic cell

Using the Galvanic cell knowledge point:

• Electroplating: Depositing a thin metal layer onto a conductive surface using an electrolytic current.
• Galvanic cell: An electrochemical cell that converts spontaneous chemical energy into electrical energy.

Define redox couple and sacrificial anode

• Redox couple: A reducing agent and its corresponding oxidized form (e.g., \(Zn/Zn^{2+}\)).
• Sacrificial anode: A highly active metal oxidized to protect a less active metal from corrosion.

Define salt bridge and spontaneous reaction

• Salt bridge: A tube containing an inert electrolyte that connects half-cells, maintaining electrical neutrality.
• Spontaneous reaction: A chemical reaction that occurs naturally without continuous external energy input.

Define standard cell potential and standard hydrogen electrode

• Standard cell potential: The potential difference between two half-cells under standard state conditions.
• Standard hydrogen electrode: The universal reference electrode with a standard reduction potential defined as exactly \(0\text{ V}\).

Define standard reduction potential and voltage

Using the Standard reduction potential knowledge point:

• Standard reduction potential: The tendency of a chemical species to acquire electrons and be reduced under standard conditions.
• Voltage: The electrical potential difference between two points, measured in volts.

Answer:

Question 1

Dry cell battery
My Definition: A portable electrochemical cell that uses an electrolyte in the form of a moist paste rather than a liquid to prevent spilling.

Question 2

Electrochemical cell
My Definition: A device capable of either generating electrical energy from chemical reactions or facilitating chemical reactions through the introduction of electrical energy.

Question 3

Electrolysis
My Definition: The process of passing an electric current through an ionic substance to force a non-spontaneous chemical reaction to occur.

Question 4

Electrolyte
My Definition: A substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water, or when molten.

Question 5

Electroplating
My Definition: A process that uses electrical current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode.

Question 6

Galvanic cell
My Definition: An electrochemical cell that uses spontaneous redox reactions to generate electricity.

Question 7

Redox couple
My Definition: A pair of chemical species consisting of a reducing agent and its corresponding oxidized form.

Question 8

Sacrificial anode
My Definition: A highly active metal that is connected to a less active metal structure to corrode preferentially and protect the main structure.

Question 9

Salt bridge
My Definition: A laboratory device used to connect the oxidation and reduction half-cells of a galvanic cell, maintaining electrical neutrality by allowing ion flow.

Question 10

Spontaneous reaction
My Definition: A chemical reaction that occurs naturally under a given set of conditions without requiring a continuous input of external energy.

Question 11

Standard cell potential
My Definition: The potential difference (voltage) between two half-cells in an electrochemical cell measured under standard conditions (1 M concentration, 1 atm pressure, and 25 °C).

Question 12

Standard hydrogen electrode
My Definition: A reference electrode used as the standard for measuring reduction potentials, assigned an electrode potential of exactly 0.00 V at all temperatures.

Question 13

Standard reduction potential
My Definition: The measure of the tendency of a chemical species to acquire electrons and thereby be reduced under standard state conditions.

Question 14

Voltage
My Definition: The difference in electrical potential energy per unit charge between two points, which drives the flow of electric current.