Transition Metals:Oxidation States

by Jules Bruno
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Hey, guys, in this new video, we're gonna take a look at how do we calculate the oxidation number of certain transition metals based on what they're connected? Thio. So we take a look at this first example it says determine the oxidation number of the underlying element. So we're looking for the oxidation state off nickel. Now hear this a little bit different from what we're used to seeing here. We actually have nickel connected to six waters inside of brackets and then chlorine to the right of it. Now remember, since we're looking for nickel here Nickleby X, then we have to ask ourselves Whats the oxidation number of water Now just think of it in simple terms. Water is a cold, violent compound and it has no charge. Therefore, it's oxidation. Number will be equal to zero. Next we have Halogen is here. We have chlorine. Now remember, chlorine here is connected to the nickel, not to the oxygen and water. And remember the rules that we've talked about in the past. Group Seven A. Elements Callejon's. They're equal to negative one. Unless they're connected to oxygen here, they're not connected to the oxygen. They're basically closely related to the nickel. Therefore, their oxidation number here is minus one. Then we're gonna use Ah, so treated like a math problem. We're gonna say, Here we have one nickel, which is X plus a six waters. Each one is zero plus two chlorine because a little too there, each one is minus one. Remember, our equation equals the charge of the molecule here. It has no charges, no positive charge or negative charge that we can see. So it's charges. Zero. This drops out because it's just zero. So X minus two equals zero x equals plus two. So nickel here would be plus two in terms of its charge. We've done this example here. I want you guys to attempt to do the next one, see if you can figure out what it would be. Remember, tell yourself this is a covalin compound. Does it have a charge or not? That determines its oxidation state from their treated like a math problem? Here. We're looking for cobalt. I want you guys to attempt to do this on your own. Come back and see how I approached the question