For each of the following balanced oxidation–reduction reactions, (i) identify the oxidation numbers for all the elements in the reactants and products and (ii) state the total number of electrons transferred in each reaction. (b) 2 Hg²⁺(aq) + N₂H₄(aq) → 2 Hg(l) + N₂(g) + 4 H⁺(aq)

Video transcript

Hi everyone. So we're asked to identify each of the oxidation numbers. Each element in the balance. Redox reaction below. We're gonna look at each reacting and product individually, zinc solid and this is in its standard state. So it's gonna be zero B. R. 03 minus a quest which has oxygen and this is not a peroxide or super oxide. So the oxygen number is going to be negative too. My bro mean, which we need to calculate, we have an overall charge of negative one on the compound. It's gonna be equal to the oxidation number of romaine plus three times negative two because we have three oxygen atoms. And as oxidation number of negative two. So for bro mean plus five we have ht o hey chris which has oxygen, this is not a peroxide or super oxide. Those can be negative too. They're for hydrogen, We need to calculate this. We have an overall charge of zero able to tune, how is the operation number of hydrogen that's negative two hydrogen plus one. And for zinc two plus years is an ion. I was gonna have a plus two charge. I mean, plus to our station number because of oxidation state is equal to the charge. And then bro, maine the r minus isn't eye on as well. So it's gonna have a negative one oxidation number is the oxidation state the charge. And for O. H minus you have oxygen and this is not a peroxide or super oxide. We're gonna get -2 for the oxidation number and they're for hydrogen we need to find this have a negative one overall charge on the compound. You set it equal to the oxidation number of hydrogen that's negative two. Here's the oxidation number of oxygen for hydrogen we get plus one we have a sink one from 0 plus two romain, Going from plus five minus one oxygen, from negative to negative two and hydrogen or from plus one plus one. Thanks for watching my video. And I hope what's up?