00:02
Hi there.
00:02
In this question, we are asked to write and balance an equation.
00:07
So we have sulfuric acid, which is h2, so4.
00:14
This is concentrated and hot.
00:17
So it's going to react with zinc in this instance.
00:22
And it's going to form zinc sulfate, hydrogen sulfide, and water.
00:39
Okay.
00:40
So this equation, to balance by trial and error, is a little tricky.
00:44
So i looked a little bit of a little bit.
00:46
At oxidation numbers.
00:50
Sulfur is plus six in that compound, and in the h2s, the sulfur is negative 2.
00:57
So that means a change of eight electrons.
01:04
In other words, it gained eight electrons.
01:11
Zinc is zero as an element and positive two in the zinc sulfate.
01:19
So that means it has lost two electrons...