Electrochemical Cell Concepts

This lesson covers the representation of electrochemical cells, building on previous knowledge of the standard hydrogen electrode and electro potentials. It explains cell diagrams, notation, and the importance of specifications. The lesson includes a practice question and a worked example, focusing on cell diagram notation, phase boundaries, and the arrangement of species based on oxidation states.

What is the standard hydrogen electrode used for?

• To serve as a reference for measuring electropotentials

• To determine the concentration of ions

• To measure the temperature of a solution

• To calculate the pH of a solution

Which of the following is a key learning objective of this lesson?

• Understanding the chemical properties of water

• Learning about electrochemical cell diagrams and notation

• Studying the periodic table

• Exploring the history of chemistry

What is the purpose of a voltmeter in an electrochemical cell?

• To measure the resistance

• To measure the temperature

• To measure the potential difference

• To measure the current

In shorthand notation, what does a double vertical line represent?

• A phase boundary

• A salt bridge

• An electrode

• A voltmeter

Which species is written closest to the salt bridge in shorthand notation?

• The species with the lowest reduction potential

• The species with the highest reduction potential

• The species with the highest oxidation state

• The species with the lowest oxidation state

What is the order of species in the written version of an electrochemical cell?

• Oxidized species, oxidized species, reduced species, reduced species

• Oxidized species, reduced species, oxidized species, reduced species

• Reduced species, oxidized species, oxidized species, reduced species

• Reduced species, reduced species, oxidized species, oxidized species

In the practice question, which half cell has a more positive electrode potential?

• The zinc half cell

• The copper half cell

• The manganate half cell

• The iron half cell

What is the role of platinum electrodes in the practice example?

• To provide a surface for the reaction

• To act as a catalyst

• To measure the temperature

• To conduct electricity

In the practice example, which direction does the reduction reaction occur?

• To the left

• To the right

• Downwards

• Upwards

What is the significance of the species with the highest oxidation state in the practice example?

• It is written farthest from the salt bridge

• It is written closest to the salt bridge

• It is not included in the notation

• It determines the color of the solution