G482 help
Can someone explain this to me, seems quite simple but I don't understand it.
Question 2aii.
http://www.ocr.org.uk/Images/58130-question-paper-unit-g482-electrons-waves-and-photons.pdf
Question 2aii.
http://www.ocr.org.uk/Images/58130-question-paper-unit-g482-electrons-waves-and-photons.pdf
Original post by Super199
Can someone explain this to me, seems quite simple but I don't understand it.
Question 2aii.
http://www.ocr.org.uk/Images/58130-question-paper-unit-g482-electrons-waves-and-photons.pdf
Question 2aii.
http://www.ocr.org.uk/Images/58130-question-paper-unit-g482-electrons-waves-and-photons.pdf
It's where physics and chemistry overlap somewhat.
Batteries produce a reduction-oxidation (redox) chemical reaction to liberate electrons and create a charge imbalance between the electrodes. The reaction takes place between the electrode atoms in contact with an electrolyte solution.
Anions are atoms that have a net -ve charge, meaning the atom has gained additional electrons to the valence shell which now outnumber protons in the nucleus.
Cations are atoms that have a net +ve charge, meaning the atom has lost electrons from the valence shell.
Electrons are negatively charged and move freely through a conductor.
During discharge, Hydrogen (H+ cations) produced at the -ve plate move into the electrolyte which are transported via the electrolyte to the +ve plate.
HSO4- anions are consumed at both plates.
Original post by uberteknik
The question is asking you for the types of charge carrier moving within the stated medium.
It's where physics and chemistry overlap somewhat.
Batteries produce a reduction-oxidation (redox) chemical reaction to liberate electrons and create a charge imbalance between the electrodes. The reaction takes place between the electrode atoms in contact with an electrolyte solution.
Anions are atoms that have a net -ve charge, meaning the atom has gained additional electrons to the valence shell which now outnumber protons in the nucleus.
Cations are atoms that have a net +ve charge, meaning the atom has lost electrons from the valence shell.
Electrons are negatively charged and move freely through a conductor.
During discharge, Hydrogen (H+ cations) produced at the -ve plate move into the electrolyte which are transported via the electrolyte to the +ve plate.
HSO4- anions are consumed at both plates.
It's where physics and chemistry overlap somewhat.
Batteries produce a reduction-oxidation (redox) chemical reaction to liberate electrons and create a charge imbalance between the electrodes. The reaction takes place between the electrode atoms in contact with an electrolyte solution.
Anions are atoms that have a net -ve charge, meaning the atom has gained additional electrons to the valence shell which now outnumber protons in the nucleus.
Cations are atoms that have a net +ve charge, meaning the atom has lost electrons from the valence shell.
Electrons are negatively charged and move freely through a conductor.
During discharge, Hydrogen (H+ cations) produced at the -ve plate move into the electrolyte which are transported via the electrolyte to the +ve plate.
HSO4- anions are consumed at both plates.
Sorry I'm a tad confused. I thought the negative ions went to the positive terminal. How do the positive ions go the the positive terminal.
I don't understand why it is positive ions?
Original post by Super199
Sorry I'm a tad confused. I thought the negative ions went to the positive terminal. How do the positive ions go the the positive terminal.
I don't understand why it is positive ions?
I don't understand why it is positive ions?
Remember that in a conductor, the atoms are locked in position, it's only the electrons that are free to move.
In the electrolyte, cations (+ve atoms) are free to move because they are in aqueous solution and are not fixed in position.
They say a picture is worth a thousand words.
These two diagrams shows the redox reactions clearly in two different battery compositions. Note the effective net flow of -ve charge is in a continuous loop.
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