Electric Cells As Energy Systems Flashcards
What is an electrolyte?
A solution that is bake to conduct electricity
How does a lemon battery work?
Through a chemical reaction
What does an ammeter measure?
How fast an electric current flows
What does a volt meter measure?
The amount of energy in a circuit
What is inside a battery?
A paste made from different chemicals
What is a paste?
A solid which behaves like a liquid i.e. Half solid half liquid
What is the source of energy in an electric circuit?
A cell or battery
What is the difference between a cell and a battery?
A cell is a single source of energy, whereas a battery is a group of cells working together
What is a system?
A group of components that work together to perform a common function
What does the electric cell system aim to do?
To generate electricity
How does an electric cell generate energy?
Through chemical reactions
What are the components of a lemon battery?
Lemon Zinc Copper Light bulb Insulated copper wires
How does a lemon battery work?
The lemon juice works as an electrolyte
The zinc and copper act as electrodes
One is positive and one is negative that is to say, one attracts electrons and one gives up electrons
This creates a current
The electrolyte allows the current to flow
Does the lemon battery work with only one type of metal?
No
What can increase the current in a lemon battery?
Juicy lemons work better Warm lemons work better Sink the electrodes deeper in the lemon More nails More lemons
Why is lemon juice an electrolyte?
It is an acid
It has more hydrogen ions
What is an electric current?
A flow of charges
Does a battery produce energy outside of a circuit?
No
What is an ion?
An atom where the protons and electrons are unbalanced
What are the components of a zinc-copper cell?
Beakers Copper surface solution Zinc sulphate solution Sodium chloride/sulphate solution U-tube Cotton wool Copper electrode Zinc electrode Insulated copper wires
How do you create a zinc-copper battery?
Place the solutions in separate beakers
Connect the electrodes to separate connecting wires
Place the electrodes in their corresponding solutions
Create a salt bridge with the U-tube and the sodium compound
Use the cotton wool to hold the sodium solution in
Place the salt bridge between the two beakers
What is a half-cell?
Half of the components of a cell
What is the purpose of the salt bridge?
To connect the two half cells
How does a zinc-copper battery work?
The zinc electrode releases ions into the zinc solution
The copper solution deposits ions onto the copper electrode
The ions flow through the salt bridge
What kind of energy transformation takes place in a zinc-copper cell?
Chemical energy➡️ Electrical Energy
How do rechargeable cells work?
An electric current is run through it, which reverses the chemical reaction
What are other chemicals which can be used in batteries?
Zinc-carbon
Nickel-cadmium
Nickel-Zinc
What is an electric cell?
A system in which chemical reactions take place to convert chemical energy into electrical energy
What can be used to construct a simple cell?
An acidic fruit
How can a complex cell be constructed?
Two beakers with an electrode and an electrolyte in each. They are connected by a salt bridge
