 So let's try to balance this redox equation. So what we're doing here is we're oxidizing cinnamal alcohol with Collins reagent or this chromium 6-oxide reagent to cinnamaldehyde here, okay? So anyways the one thing I want you guys to think about is since this is a redox reaction We're going to have to break it into its two reaction components It's reduction half reaction and it's oxidation half reaction, okay? so Let's write those out. So So the reduction Well, the oxidation is from the cinnamal alcohol to the cinnamaldehyde and how do I know that really quickly is because I'm Losing hydrogens, okay? So if I'm losing hydrogens that means I'm getting oxidized, okay? So The other portion is the reduction. So we've got CR03. Remember in these balancing redox reactions and acidic solutions whenever we have extra oxygens we put them as water balance extra oxygens So since we've got three That's the three waters there Remember after that The hydrogens we balance this H plus on this side. So how many do we have? So Then the next thing we do is balance our charge So on this side we have plus six Six plus it on this side. We have plus three So to balance our charges, we're going to have to add some electrons so here we'll add three electrons so three minus That'll give us three plus So we have balance in both atoms and charge on this reaction. Does everybody understand that? Here we have no balance, right? So ten H is here eight H is here The way that we recover from that is adding H pluses So we're going to have to add two H pluses Or protons if you like Now the thing isn't balanced, right? We have a zero charge over here, but a plus two charge over here So we're going to add Two electrons like that everybody should be cool with that so Now what we're going to do is we got to balance the number of electrons to each of these Okay, so we need to find a common factor So this one has three electrons and this one That's two So we're going to multiply this one by two and this one by three Okay, giving us six electrons in each one Okay So let's write it out. So six electrons plus 12 Frotons or hydrogen ion Plus Plus Water and this one's Remember now what we can do I'm going to erase the initial reaction so now what we do to Write the overall reaction is to cancel out things that are on both sides of the reaction So you see here Got the six electrons on both sides. That's the thing you're used to canceling out but in this case hopefully you see we've got six H pluses here and 12 H pluses here So what we're going to do in this case is cancel out that six H plus And make that a six And now we're just going to combine the overall reaction So we got the overall reaction is going to be six H plus a Q plus two CR of three Plus three C nine H ten eight Oh goes to To see our plus Plus six H two oh like with plus Oh That is the overall Balance three dots equation for the oxidation using Collins reagent To make sense to you guys Remember balance atoms then charge then push them together. Okay. Good job guys