18 Questions
What does a platinum electrode provide in a cell?
A conducting surface for electron transfer
In the context of cell diagrams, what does a comma typically signify?
Separation between oxidized and reduced species
Why is a platinum electrode used if a system does not include a metal that can act as an electrode?
Because platinum is unreactive and can conduct electricity
What should be used to represent different physical states in a half equation within a cell diagram?
Solid vertical line
What does the double line in a cell diagram represent?
Salt bridge between two half cells
Why is it not possible to measure the absolute potential of a half electrode on its own?
Because it lacks the reference point provided by another electrode
What role does the salt bridge play in an electrochemical cell?
Facilitates electron flow between the two half-cells
Why does a voltage form in an electrochemical cell with zinc and copper half-cells?
More electrons accumulate on the copper electrode than on zinc electrode
What is the function of a high resistance voltmeter in an electrochemical cell?
To measure the maximum possible potential difference
Which electrode in an electrochemical cell is typically considered as the negative terminal?
Zinc electrode
Why are simple half cells composed of a metal and a solution of a compound containing that metal?
To form a circuit that generates voltage
What is the purpose of having distinct half-cells in an electrochemical setup?
To enable controlled oxidation and reduction reactions
Why is a wire not used in a salt bridge for an electrochemical cell?
The wire can set up its own electrode system with the solutions.
What happens if the voltmeter is removed and replaced with a bulb in an electrochemical cell circuit?
The bulb will light up due to the flow of current.
In an electrochemical cell, what happens as the reactants are used up?
The voltage falls to zero.
What does a cell diagram for an electrochemical cell represent?
The components and their phase boundaries in the cell.
Which electrode in an electrochemical cell always undergoes reduction?
The most positive electrode.
Why is potassium chloride not suitable for copper systems in a salt bridge?
Chloride ions can form complexes with copper ions.
Test your knowledge on the components of an electrochemical cell diagram, including solid electrode, solution electrolyte, and salt bridge. Learn about the use of platinum electrode in systems lacking appropriate metal electrodes.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
