00:01
Okay, so when the following aquarium is balanced properly under aesthetic conditions, what are the coefficients of those species shown? so, let's write down the aquarium.
00:12
You have the hs -o -2, with chromium 3 -plus, and it produced h -3 -as -0 -4, and chromium 2 -plus.
00:33
So first, let's check the valiant state.
00:37
So for arsenic, in this case, initially, we can see it's plus three states.
00:47
And once it becomes the h3 -as -0 -4, clearly it's a plus -5 state.
00:56
So for the as, each compound rate actually gains two electrons.
01:04
So this is a reduction reaction.
01:10
For chromium, initially it's plus three states.
01:14
And once it becomes, once the reaction happens, it becomes two plus states.
01:20
So clearly, it gains one electrons.
01:30
So for as, it loses two electrons.
01:36
So how can we balance that? so first, we can say now the electron is not balanced because electron gaining is two.
01:43
Electron loss is two.
01:44
Electron gaining is 1...