Name each ionic compound containing a polyatomic ion. a. Ba(OH)2 b. NH4 I c. NaBrO4

Name each ionic compound containing a polyatomic ion. a....

Key Concepts

Ionic Compounds

Ionic compounds are formed by the electrostatic attraction between positively charged ions (cations) and negatively charged ions (anions). These compounds consist of a lattice structure where the ions are arranged in a repeating pattern. Studying these compounds involves understanding their composition, properties, and the formation of ionic bonds between different elements or polyatomic ions.

Polyatomic Ions

Polyatomic ions are ions that consist of two or more atoms covalently bonded together that behave as a single charged entity. They can carry either a negative or positive charge and are a key part of many ionic compounds. Recognizing and naming polyatomic ions is critical, as it affects the overall nomenclature and properties of the compounds in which they appear.

Nomenclature of Ionic Compounds

The nomenclature of ionic compounds is based on a systematic method for naming the ions involved. The name of the cation is stated first, followed by the name of the anion. Special rules apply when naming compounds that contain polyatomic ions, such as using accepted names for common ions like hydroxide, ammonium, and bromate. Mastery of these naming conventions is essential for accurately identifying and communicating chemical compounds.

Transcript

00:01 So in this problem, we are asked to name each of the ionic compounds containing a polyatomic ion.

00:05 So the first compound we have here is barium hydroxide, b .h2.

00:15 So to write down the name of an ionic compound, first we have to identify the cataon and the anion.

00:24 So from here, barium will be our cation and o .h will be our anion.

00:28 So how we can identify the cation and anion.

00:31 So to identify that, we have to look at the periodic table and if the element or atom is present in the left side of the periodic table, that means it will act as a cat -ion or metallic ion.

00:44 And if the elements are present in righter side of the periodic table, that means they will act as an an ion.

00:52 So here, barium is present in group 2a and that's why barium will obviously be the best candidate for the cat -hound here.

01:04 And our anion here in that case obviously is oh -h now we have to identify the charge on barium and oh -h so for b a since it's in group 2a the charge will always be fixed as plus 2 and to calculate the charge on oh h what we have to do we have to look at the oxidation state of oxygen and hydrogen so oxidation state of oxygen is usually minus 2 and oxygen state of hydrogen is usually plus 1.

01:35 So minus 2 plus 1 will give us minus 1, which is the charge on oh.

01:41 Now we have identified the cation and anion, and we have identified their charge.

01:46 Now we can write down the name.

01:48 So first we'll write down the cataon name, which is barium.

01:54 And then we have to write down the anion name, which is hydroxide.

02:05 So barium hydroxide is the name of this compound.

02:10 Then our second problem is nh4i.

02:19 So again, we have to identify the gatown and anion...