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zorro
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How do I remember that anode is positive in electrolysis but negative in electrochemical cells?
I always forget it :|
I always forget it :|
Borek said:Cathode is where the cations go.
alxm said:One's where an oxidation occurs and the other is where a reduction occurs.
I think. I have to admit I never can remember that either. I just look it up again whenever i need to know. Even got confused about it when defending my Master's Thesis a number of years ago.. :) The only ones I know who seem to get it right consistently are actual electrochemists.
I can do tensor calculus, but plus and minus still manages to baffle me...
mack_10 said:in valves (showing my age here) the cathode was where the electrons came from and the anode is where they go to
Borek said:Cathode is where the cations go.
Tubes if you're AmericanAbdul Quadeer said:valves ?
wajagawa said:"Red cat, Anny Ox" (Reduction at the cathode, oxidation at the anode. )and "LEO says GER" (Lose electron oxidation/ gain electron reduction).
Knowing these two phrases (?) you will know how electrons flow and can tell which is positive and negative with ease.
There are several ways to remember the charge of electrodes. One method is to use the mnemonic "AN OX" which stands for "anode is oxidation" and "cathode is reduction". Another way is to remember that anions (negative ions) are attracted to the anode, while cations (positive ions) are attracted to the cathode.
It is important to remember the charge of electrodes because it determines the direction of electron flow in an electrochemical cell. This information is necessary for understanding and predicting the outcome of a chemical reaction.
The charge of an electrode is primarily determined by the type of material it is made of. However, other factors such as the concentration of ions in solution and the applied voltage can also influence the charge of electrodes.
Yes, the charge of electrodes can change depending on the conditions of the electrochemical cell. For example, if the voltage is reversed, the anode and cathode will also switch roles and their charges will change accordingly.
One way to remember the charge of specific electrodes is to use the mnemonic "RED CAT" which stands for "reduction at cathode". It is also helpful to remember that the electrode with a higher concentration of electrons will have a negative charge, while the electrode with a lower concentration of electrons will have a positive charge.