00:01
Okay, this question is four questions in one, essentially doing the same thing for four different species.
00:06
First one is cobalt from aqueous cobalt 2 plus.
00:10
First thing that we need to do is take the time that's been given to us of one hour, converted into seconds.
00:16
Then knowing the seconds that passed, we can convert the seconds into kulams using the current of 15 ampires.
00:23
And then convert the kulams into moles of electrons using faraday's constant.
00:28
Then when we know the moles of electrons available to us, we can convert the moles of electrons required into the moles of electrons, i'm sorry, the moles of electrons required to get one mole of cobalt, which is two moles of electrons per one mole cobalt.
00:45
So this conversion gives us now moles cobalt from the moles of electrons that are available to us.
00:51
We can then convert the moles of cobalt into grams of cobalt using the molar mass of cobalt.
00:56
16 .5, or i guess to two significant figures, just 17 grams of cobalt.
01:03
We do the same thing for half -neum.
01:07
Half -neum goes from half -neum 4 plus to half -neum solid, which requires four moles of electrons per mole of half -neum.
01:17
But the beginning of this calculation is essentially the same...