Please enable JavaScript.
Coggle requires JavaScript to display documents.
Deconstruct and Design Task: To design an electrochemical cell that…
Deconstruct and Design Task:
To design an electrochemical cell that produces an optimal energy output.
What is "an optimal energy output"?
Battery Capacity
Amps
The amount of amp the battery has relates to the amount of energy that the battery can produce at a given time. The higher the amperage, the higher the quantity of electrons that will be moved. (Amps = Watts/Volts)
Battery Flow
Voltage
A batteries voltage determines how fast the battery can flow electrons. The higher the voltage, the faster the rate of flow of electrons. (Volts = Watts/Amps
How to measure optimal energy output
Measuring the amps produced by a galvanic cell
Measuring the voltage output produced by a galvanic cell
Measuring the power of a galvanic cell, volts multiplied by amps
Power/Watts, (Watts = Amps x Volts)
Volts x Amps
Power, Volts, or amps over time
What is "an electrochemical cell"?
"a device that can generate electrical energy from the chemical reactions occurring in it" [Byjus, 2022]
Types of electrochemical cells
Galvanic/Voltaic
A galvanic cell is an electrochemical cell which utilises free chemical energy within a reaction, as electrical energy
Galvanic cells produce energy, and since we are measuring energy output, a galvanic cell will be used
Electrolytic
The chemical reactions that occur in a normal battery (galvanic cell) are reversed, and require electrical energy to occur.
How can an electrochemical cell be made
A salt bridge
Usually potassium chloride, as both ions have the same number of electrons and are similar in size.
Anolyte (electrolyte for anode)
The stronger the oxidiser, the higher the energy output. A Salt which will not react conversely with the anode or cathode
Beakers to hold electrolytes
Catholyte (electrolyte for cathode)
The stronger the reducing agent, the higher the energy output. A salt which will not react conversely with the anode or cathode
A multimeter
An anode
Must oxidise efficiently and be conductive
A cathode
Must reduce efficiently and be conductive
How could the optimal energy output be tested (Including IV's)
Should include multiple cell arrangements
Should measure both volts and amps
Easy to construct, with simple parts
The easier to build, the more trials that could be completed
Comparing different electrolytes (both catholytes and anolytes) (IV)
A common liquid electrolyte for a galvanic cell is copper sulphate, it may be a good idea to test a stronger oxidiser and see how this affects the power output.
A common liquid electrolyte for the cathode portion of a galvanic cell is zinc sulphate, using a stronger reducer may be a good idea to compare energy output.
Changing the temperature of the electrolytes (IV)
Concentration of electrolytes (IV)
Comparing different anodes and cathodes (IV)
Using the corresponding metal anode or cathode to the electrolyte is optimal (copper sulphate anolyte will have a copper metal anode)
Mass and surface area of the electrode (IV)
Concentration or surface area of the salt bridge (IV)