MC789

2+ Year Member
May 27, 2015
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  1. Pre-Medical
I was doing a practice problem in TBR and came across a question that asked: when an anion particle is moving across an electric field from left to right, how would the anode and cathode be placed -- left or right?

I thought since anion, which is negatively charged, has to move from left to right according to question, right side has to be positively charged to attract the anion that way. since reduction happens at the cathode and reduction is losing electrons, giving a positive charge, I said cathode should be on right and anode to the left.
so anion is migrating from anode to cathode.

BUT: correct answer is: an anionic particle always migrates from cathode to anode in a uniform electric field.

they didn't really explain why but just stated this like a general statement. can someone please explain?
 
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