Electrochemistry - Moles of Electrons From Electric Current
Based on Faraday's experiment, 1 mole of electrons has a charge of 96500 Coulombs. Let's call this quantity Q₀. Well, the value of moles of electrons can be calculated using the equation: nₑ = Q/Q₀
Examples of electrolysis questions:
In an electrolysis cell, an electric current of 5 Ampere flows for 8 hours. The question is, how many moles of electrons flow in this circuit?
Examples of electrolysis questions:
In an electrolysis cell, an electric current of 5 Ampere flows for 8 hours. The question is, how many moles of electrons flow in this circuit?
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LearningTranscript
00:00In an electrolysis cell, an electric current of 5 ampere flows for 8 hours.
00:06The question is, how many moles of electrons flow in this circuit?
00:14Okay, electric current is a flow of electrons.
00:24Mathematically, the amount of electric current can be calculated through the equation
00:28I equals Q over T, where Q is the total electric charge,
00:36T is the time duration,
00:40I is the electric current.
00:48Based on Faraday's experiment, one mole of electrons has a charge of 96,500 coulombs.
00:55Let's call this quantity Q0.
01:01Well, the value of moles of electrons can be calculated through the equation
01:05N sub E equals Q over Q0.
01:12The first stage is identification.
01:15Electric current, I is equal to 5 amperes.
01:19Time duration, T equals 8 hours.
01:22In units of seconds, this value is multiplied by 60 minutes per hour,
01:26multiplied by 60 seconds per minute.
01:29T is equal to 28,800 seconds.
01:35The next stage is to calculate the total electric charge.
01:38Q is the same as I times T.
01:43Enter the values I and T.
01:45Q is equal to 144,000 coulombs.
01:50So, now, KIT can calculate the value of moles of electrons.
01:55N sub E is equal to Q over Q0.
02:01Enter the values Q and Q0.
02:05This value is approximately 1.5 moles.
02:09Hope it is useful.
02:10And, don't forget to watch the next video.