00:01
To balance the following redox reaction in acidic solution, i'll be using the half reaction technique.
00:07
One half reaction is the manganese in permanganate going to mn2+.
00:16
To balance this, we make sure we have the same number of manganese, one and one.
00:21
We then balance our oxygens with water.
00:24
We have four oxygens on the left, so we'll need four waters on the right in order to get four oxygens.
00:33
But that introduces eight hydrogens, so in an acidic solution we'll add eight h +, to the left -hand side.
00:42
Now we've got a total charge of 2 +, and a total charge of 7+.
00:48
So in order to get a 2 +, on both sides, we need to add five electrons.
00:54
For the second half reaction, we have hso3-, going to so4.
01:07
So4 3-, that doesn't make sense...