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How Electrochemical Cells Work: Fun Facts and Their Cool Uses

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20/09/2023

Chemistry

electrode potentinals, electrochemical cells & commerical applications of electrochemical cells | AQA A-Level Physical Chemistry

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Chemistry

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Physical chemistry

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Electrode potentials and electrochemical cells (a-level only)

How Electrochemical Cells Work: Fun Facts and Their Cool Uses

Electrode Potentials and Electrochemical Cells: A Comprehensive Guide

This guide explores the fundamentals of electrode potential in electrochemical cells, covering their structure, operation, and commercial applications. The content details the importance of standard electrode conditions and various commercial applications of electrochemical cells including batteries and fuel cells.

Key points:

  • Electrochemical cells facilitate redox reactions through electron transfer via external circuits
  • Standard electrode potentials are measured under specific temperature, pressure, and concentration conditions
  • Commercial applications include rechargeable batteries, non-rechargeable batteries, and fuel cells
  • Environmental considerations include efficiency benefits and storage challenges
...

20/09/2023

318

ELECTRODE POTENTIALS AND ELECTROCHEMICAL CELLS 3.1.11.1 Electrode potentials and cells ELECTROCHEMICAL CELLS Redox reactions take place in e

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Page 2: Standard Conditions and Commercial Applications

This page details the importance of standardized conditions in measuring electrode potentials and introduces commercial applications of electrochemical cells.

Definition: Standard electrode conditions require 1 atm pressure, 1 mol/dm³ concentration, and 298 K temperature.

Highlight: The more negative the EMF value, the better the reducing agent performs in the cell.

Example: Lithium cells have a cell potential of 3.6V and can be recharged by applying an external current.

Vocabulary: EMF ElectromotiveForceElectromotive Force - The potential difference or voltage generated by the cell.

ELECTRODE POTENTIALS AND ELECTROCHEMICAL CELLS 3.1.11.1 Electrode potentials and cells ELECTROCHEMICAL CELLS Redox reactions take place in e

View

Page 3: Fuel Cells and Their Impact

The final page focuses on fuel cell technology, particularly the hydrogen-oxygen fuel cell, and discusses their societal implications.

Definition: Fuel cells generate electrical current through continuous chemical reactions without requiring electrical recharging.

Example: In a hydrogen-oxygen fuel cell, the overall reaction produces water: 2H₂ + O₂ → 2H₂O

Highlight: Fuel cells offer high efficiency and produce only water as a byproduct, but hydrogen storage presents safety challenges.

Quote: "High efficiency → more energy out of the same amount of fuel than less efficient devices"

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Subjects

Chemistry

Physical chemistry

Electrode potentials and electrochemical cells (a-level only)

 

Chemistry

•

318

•

20 Sept 2023

•

3 pages

How Electrochemical Cells Work: Fun Facts and Their Cool Uses

B

bv

@bv

Electrode Potentials and Electrochemical Cells: A Comprehensive Guide

This guide explores the fundamentals of electrode potential in electrochemical cells, covering their structure, operation, and commercial applications. The content details the importance of standard electrode conditions and various commercial applications... Show more

ELECTRODE POTENTIALS AND ELECTROCHEMICAL CELLS 3.1.11.1 Electrode potentials and cells ELECTROCHEMICAL CELLS Redox reactions take place in e

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Page 2: Standard Conditions and Commercial Applications

This page details the importance of standardized conditions in measuring electrode potentials and introduces commercial applications of electrochemical cells.

Definition: Standard electrode conditions require 1 atm pressure, 1 mol/dm³ concentration, and 298 K temperature.

Highlight: The more negative the EMF value, the better the reducing agent performs in the cell.

Example: Lithium cells have a cell potential of 3.6V and can be recharged by applying an external current.

Vocabulary: EMF ElectromotiveForceElectromotive Force - The potential difference or voltage generated by the cell.

ELECTRODE POTENTIALS AND ELECTROCHEMICAL CELLS 3.1.11.1 Electrode potentials and cells ELECTROCHEMICAL CELLS Redox reactions take place in e

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Page 3: Fuel Cells and Their Impact

The final page focuses on fuel cell technology, particularly the hydrogen-oxygen fuel cell, and discusses their societal implications.

Definition: Fuel cells generate electrical current through continuous chemical reactions without requiring electrical recharging.

Example: In a hydrogen-oxygen fuel cell, the overall reaction produces water: 2H₂ + O₂ → 2H₂O

Highlight: Fuel cells offer high efficiency and produce only water as a byproduct, but hydrogen storage presents safety challenges.

Quote: "High efficiency → more energy out of the same amount of fuel than less efficient devices"

ELECTRODE POTENTIALS AND ELECTROCHEMICAL CELLS 3.1.11.1 Electrode potentials and cells ELECTROCHEMICAL CELLS Redox reactions take place in e

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Page 1: Fundamentals of Electrochemical Cells

The first page introduces the basic concepts of electrochemical cells and their components. The cell structure consists of two electrodes connected by a salt bridge, allowing for controlled electron transfer through an external circuit.

Definition: Electrochemical cells are devices where redox reactions occur through indirect electron transfer via an external circuit.

Vocabulary: Salt Bridge - A component that maintains charge balance without transferring electrons between half-cells.

Highlight: The conventional representation places the more negative potential on the left and the more positive potential on the right.

Example: In a Zinc-Copper cell Zn(sZn(s|Zn²⁺||Cu²⁺|Cuss), electrons flow from zinc to copper through the external circuit.

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