Cells & Batteries Flashcards
What is an electrochemical cell?
An electrochemical cell is a device that can generate electrical energy from the chemical reactions occurring within it.
It is formed from 2 electrodes in contact with each other via a wire and an electrolyte.
How is an electrochemical cell set up?
- Two electrodes made of different conductive metals
- Voltmeter connected to electrodes with wire
What affects the voltage of an electrochemical cell?
The reactivity of the electrolyte and electrodes affects the voltage of a cell
Why do non-rechargeable batteries run out?
The chemical reactants are fully used up - so no more electricity can be produced.
How are rechargeable batteries recharged?
The chemical reactions are reversed when an external electrical current is supplied.
Are alkaline batteries rechargeable or non-rechargeable?
Alkaline batteries are non-rechargeable.
