00:06
Okay, balance the equation.
00:11
So it has the manganese per oxide, right? the permagnate, so it's mn -o -4 minus in the equate and react with the h2 -c -204, also in the equate state.
00:37
So we'll produce manganese 2 plus and the co2.
00:47
So first we need to determine the valent state of some important elements.
00:55
Here you can easily see that manganese here has a valent state change.
01:01
So how about the permagnate? what is the valent state of the permagnate here? so we know the oxygen here.
01:09
Each oxygen is a carous two negative charge.
01:14
And so it has four times minus two total, right? so it has minus a charge.
01:23
So the total charge of the magnet is minus 1.
01:29
So that means you have to plus 1 here.
01:32
So that means the magnet is plus 7 in the valent state.
01:38
And when it becomes magnesium, right? magnet is 2 plus.
01:42
So you already know it's 2 plus.
01:44
So the violent state becomes 2 plus here.
01:47
So easily from here you see from mangan, oxide to the magnetized iron, five electron transfer against five electrons.
02:01
Now we move to the h204 here.
02:04
So how we calculate? so this is a neutron one, so that's much easier.
02:09
You have the oxygen carry, full oxygen, carry two charges, negative charges, so you have eight negative charges, right? and then you had two hydrogen, right? so it carries two positive charge.
02:27
So you have to balance them.
02:28
So you have a minus negative sign over two.
02:33
So that tells you, right, the carbon has a latent state of the three, which is a plus three state.
02:43
And when it becomes carbon dioxide, now it becomes plus four.
02:48
Because oxygen, two oxygen carries, right, minus four, for negative charge.
02:56
So the carbon has to carry four positive charge.
02:59
So the valent state is plus four.
03:01
So that means each h2c204 will transfer how much two electrons, right? we'll gain or lose two times one electron because one carbon lose one electron's right...