Chemistry 5.2.1 Flashcards
Define ‘Simple Cell’:
A Simple Cell is a source of Electrical Energy.
The simplest design of a ___ consists of 2 Electrodes of Metals with diff. Reactivity, immersed in an Electrolyte & connected to an External Voltmeter by wire, creating a complete Circuit.
Simple Cell.
A common example of the 2 Metals used for a Simple Cell are…
Zinc & Copper.
In a Simple Cell, Zinc is the more Reactive Metal, so forms Ions more easily, readily releasing …
Electrons.
The Electrons in a Simple Cell give the more Reactive Electrode a Negative Charge, & sets up a ___ ___between the Electrodes.
Charge Difference.
Once a Charge Difference is set in a Simple Cell, The Electrons then flow around the Circuit to the Copper Electrode which is now the more ___ Electrode.
Positive.
After Electrons flow around the Positive Electrode, the difference in ability of the Electrodes to release Electrons causes a ___ to be produced.
Voltage.
The greater the difference in the Metals’ Reactivity in a Simple Cell, the greater the ___ produced.
Voltage.
What else in a Simple Cell affects the Voltage Produced, other than the Reactivity of the Metals?
The Electrolyte used.
Electrochemical Cells include…
Batteries.
How do Batteries work?
By Connecting 2 or more Cells in Series, which combine to give a larger overall Voltage.
What happens to the Electrodes in a Battery over time?
They degrade, as the Reactions that occur there are Irreversible.
Cells produce a Voltage, only until…
One of the Reactants is used up.
When 1 of the Reactants in a Cell is used up, the Battery…
Dies.
The Products formed in Batteries cannot be reverted back into the Reactants, because…
The Reaction is Irreversible.
