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.
Because Products from Batteries cannot revert back to the Reactants, the Battery must be…
Replaced.
