- #1
kristof
- 3
- 0
Hello
Please help me with this.
Cathode has negative charge, anode has positive charge. Electrons travel from anode to cathode.
Question 1: why is anode positive and attracts anions? How can the charge build up on this electrode if electrons are constantly flowing out of this electrode? If it has constant supply of electrons, then it also should be negative.. I would understand that anions would be attracted to it if the charge was fixed and positive. I understand that there would be a lack of electrons causing positive charge at anode and negative at cathode. But I don't understand what causes anode to be of positive charge.
If you can, please answer also the second question:
Question 2: During electrodeposition on the cathode, a potential is appied and metal cations become reduced to zero charge (in anodic stripping voltammetry). In case of using glassy carbon electrode, they are deposited on the electrode and stripped back into the solution which causes faradaic current to flow into the cathode and is indicative of the metal concentration in the solution. Is that correct understanding of this? If so, when the metal cations are becoming reduced at cathode, why they don't flow back into the solution? There are no forces holding them onto the glassy carbon electrode (no amalgamate is formed).
Please help me with this.
Cathode has negative charge, anode has positive charge. Electrons travel from anode to cathode.
Question 1: why is anode positive and attracts anions? How can the charge build up on this electrode if electrons are constantly flowing out of this electrode? If it has constant supply of electrons, then it also should be negative.. I would understand that anions would be attracted to it if the charge was fixed and positive. I understand that there would be a lack of electrons causing positive charge at anode and negative at cathode. But I don't understand what causes anode to be of positive charge.
If you can, please answer also the second question:
Question 2: During electrodeposition on the cathode, a potential is appied and metal cations become reduced to zero charge (in anodic stripping voltammetry). In case of using glassy carbon electrode, they are deposited on the electrode and stripped back into the solution which causes faradaic current to flow into the cathode and is indicative of the metal concentration in the solution. Is that correct understanding of this? If so, when the metal cations are becoming reduced at cathode, why they don't flow back into the solution? There are no forces holding them onto the glassy carbon electrode (no amalgamate is formed).