Name the following ionic compounds: (i) K 2 CrO 4

Hey everyone in this example we need to give the name of arianna compound. We need to recall that an ionic compound consists of a medal bonded to a nonmetal or poly atomic ion. And it could be a metal or a pol atomic iron as well. So we also want to recall that ionic compounds involved the transfer Of electron charge between the two atoms. So in this case we have S. R. O. H. With a subscript of two. What this subscript of two is telling us is that we have a charge that was crossed. And so this tells us that we originally had S. R. With a plus to charge. Sorry about that. And we wanna recall that our charge will correspond to the group number. And so we go to when we look at our plus two charge we're going to know that we have to go to Group two a. On our periodic table. And this is where we will find our atom strontium which we can confirm is going to be a metal atom Because it's in group two a. So the next part is focusing on our, oh wait here. And so now that we know at least the first part of our name strontium, we want to figure out what this O. H. Is. We should recall that we also had a second charge cross with this with the bonding of these two different atoms. So this poly atomic ion here we know it's a poly atomic ion because we have an oxygen bonded to a hydrogen and it's in parentheses with a subscript. So we need to figure out that original charge on this poly atomic ion. And that happened when we crossed our charges here from between our strontium and our poly atomic ion. And so what this means is that we have O. H. As a poly atomic ion which is written out as hydroxide And this is written out with the -1 charge. So this is a an ion because it's negatively charged. Now we don't use any prefixes here when it comes to anything with hydroxide in it. So we just go ahead and we're going to write out our name completely. And what we're going to have is strontium hydroxide. So this is actually going to complete this example as our final answer, as the name of our ionic compound given S. R. O. H. Two. So if you have any questions, please leave them down below. Otherwise I will see everyone in the next practice video

Ch.2 - Atoms, Molecules, and Ions

Brown - Chemistry: The Central Science 14th Edition

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Brown 14th Edition

Ch.2 - Atoms, Molecules, and Ions

Problem 71i

Chapter 2, Problem 71i

Name the following ionic compounds: (i) K₂CrO₄

Verified step by step guidance

Step 1: Identify the cation and the anion in the compound. In K2CrO4, K is the cation and CrO4 is the anion.

Step 2: Name the cation first. The cation K is potassium.

Step 3: Name the anion. The anion CrO4 is chromate.

Step 4: Combine the names of the cation and anion. The name of the compound is Potassium Chromate.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Ionic Compounds

Ionic compounds are formed when atoms transfer electrons, resulting in the formation of positively charged cations and negatively charged anions. These oppositely charged ions attract each other, creating a stable compound. Understanding the nature of ionic bonds is essential for naming and writing formulas for these compounds.

Nomenclature of Ionic Compounds

The nomenclature of ionic compounds involves specific rules for naming the cations and anions. Typically, the cation is named first, followed by the anion. For polyatomic ions, such as chromate in K2CrO4, it is important to recognize their names and charges to accurately name the compound.

Polyatomic Ions

Polyatomic ions are ions composed of two or more atoms that are covalently bonded and carry a net charge. In the case of K2CrO4, the chromate ion (CrO4^2-) is a polyatomic ion. Recognizing these ions and their charges is crucial for correctly identifying and naming ionic compounds.