00:01
Hi, so to solve for this, let's write first the balance equation for this reaction.
00:08
The half reaction would be we have cobalt 2 plus, this is a cubic solution.
00:13
Then we have here the product, cobalt, solid, and then that means we have here two electrons.
00:20
Okay, so that's the equation.
00:22
What will calculate first is the number of moles of electrons that were transferred.
00:28
So remember, columns is equivalent to amper, which is the current.
00:35
So here is multiplied by time in terms of seconds.
00:43
Okay, so that's multiplied the current.
00:47
We have 0 .640, and then the time is 39 .7.
00:55
This is minutes.
00:56
So convert this to seconds.
00:58
The conversion factor is that in one minute, we have 60 seconds.
01:02
Okay, that means you could cancel this.
01:05
And calculating we'll get 1524 .48 columns.
01:14
Okay, so now we will convert columns to faraday and then to moles have elections.
01:22
1524 .48 columns.
01:27
The conversion factor is that in one far a day, we have 9 -6 -485 columns...