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How do you work out half equations in electrolysis?

2 answers
Answered Nov 18Maths
Andrew's profile picture
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Andrew BradshawI’m here to help141 students helped

Firstly you need to know the electrolyte and thus the cation(s) and anion(s) involved. Then you know the ions will be attracted to the oppositely charged electrode and will either gain electrons to (usually) form a metal (cations at the cathode) or will lose electrons to (usually) form a gas (anions at the anode). The number of electrons will depend on the charges of the ions, but the number being given up by the anions should balance with the number being collected by the cations.

Answered Nov 18Maths
Andrew's profile picture
Verified
Verified
Andrew BradshawI’m here to help141 students helped

Firstly you need to know the electrolyte and thus the cation(s) and anion(s) involved. Then you know the ions will be attracted to the oppositely charged electrode and will either gain electrons to (usually) form a metal (cations at the cathode) or will lose electrons to (usually) form a gas (anions at the anode). The number of electrons will depend on the charges of the ions, but the number being given up by the anions should balance with the number being collected by the cations.