Polyatomic ions naming compounds with

We can name compounds with polyatomic ions by separating the compound into a cation and an anion, which is usually the polyatomic ion. 

Given a name or chemical formula, tell whether it represents a binary ionic compound, an ionic compound with polyatomic ion(s), a binary covalent compound, a binary acid, or an oxyacid. 

Convert between names and chemical formulas for binary ionic compounds, ionic compounds with polyatomic ion(s), binary covalent compounds, binary acids, and oxyacids. 

Naming Ionic Compounds with Polyatomic Ions... 

If you answered incorrectly, review The Polyatomic Ions, page 92, and Naming Ionic Compounds with Polyatomic Ions, page 96. 

A polyatomic ion is an ion that contains two or more elements. Compounds containing polyatomic ions are composed of three or more elements and usually consist of one or more cations combined with a negative polyatomic ion. In general, naming compounds containing polyatomic ions is similar to naming binary compounds. The cation is named first, followed by the name for the negative polyatomic ion. 

Compounds with Polyatomic Ions Acid Names from Anion Names Binary Covalent Compounds Straight-Chain Alkanes Molecular Masses Formulas and Models... 

Ionic compounds involving polyatomic ions follow the same basic rule Write the name of the metal first, and then simply add the name of the nonmetal (with the polyatomic anions, it is not necessary to add the -ide ending). 

Many ionic compounds contain anions with more than one atom. These ions are called polyatomic ions and are tabulated in Table 4-2. In naming compounds that contain these polyatomic ions, simply use the name of the polyatomic ion as the name of the anion. For example, KNO3 is named according to its cation, potassium, and its polyatomic anion, nitrate. The full name is as follows ... 

Table 4.5 gives examples of ionic compounds, including those with polyatomic ions and with elements showing variable oxidation states. These examples will allow you to deduce formulas and names from the ions present. 

Compounds containing polyatomic ions are named in the same manner as binary ionic compounds. The name of the cation is given first, followed by the name of the anion. For example, the two compounds formed with silver by the nitrate and nitrite anions are named silver nitrate, AgN03, and silver nitrite, A 02, respectively. When multiples of a polyatomic ion are present in a compound, the formula for the polyatomic ion is enclosed in parentheses. 

When naming ionic compounds containing polyatomic ions, we write the positive ion, usually a metal, first, and then we write the name of the polyatomic ion. It is important that you learn to recognize the polyatomic ion in the formula and name it correctly. As with other ionic compounds, no prefixes are used. 

Chapter 6, Ionic and Molecular Compounds, describes how atoms form ionic and covalent bonds. Chemical formulas are written, and ionic compounds— including those with polyatomic ions—and molecular compounds are named. An introduction to the three-dimensional shape of carbon molecules provides a basis for the shape of organic and biochemical compounds. Organic chemistry is introduced with the properties of inorganic and organic compounds and condensed structural formulas of alkanes. Section 6.1 is now tilled Ions Transfer of Electrons, 6.2 is titled Writing Formulas for Ionic Compounds, 6.3 is... 

U 1 Name ions, binary inorganic compounds, oxoacids, compounds with common polyatomic ions, and hydrates, and write their formulas (Toolboxes D.l and D.2, Self-Test D.l, and Examples D.l, D.2, and D.3). 

Since polyatomic ions already have specific names, these names are not changed when the ion becomes part of a compound. For example, if the sulfate ion, S042-, combines with a calcium ion, Ca2+, the resulting compound, CaS04, is called calcium sulfate. 

Polyatomic Ions Polyatomic ions are ions that have many atoms bonded together. It is best to become familiar with the names and charges of these compounds. A listing can be found in the reference tables in Appendix 4 in the back of this book. An example of a polyatomic ion that has been presented earlier in this chapter is NH41+, the ammonium ion. The compound NH4C1 would be called ammonium chloride. 

Polyatomic ions have fixed charges and can combine with ions of opposite charge to form ionic compounds. These compormds are named by writing the name of the positive ion first and then the name of the negative ion. 

This is an ionic compound in which the metal cation (K ) has only one charge. The correct name is potassium hypochlorite. Hypochlorite is a polyatomic ion with one less O atom than the chlorite ion, C102 . 

In naming ionic compounds, it is important to recognize polyatomic ions and to determine the charge of cations with variable charge. 

The bonding between the atoms within polyatomic ions is just like the bonding within molecular compounds (Section 5.3), but the group of atoms has either more or fewer electrons than protons and therefore has an overall charge. Compounds that contain polyatomic ions are ionic, and their formulas are written by the same procedure described for binary ionic compounds. The only difference is that the polyatomic ion formula is enclosed in parentheses when more than one such ion is present. For example, the formula of aluminum nitrate is Al(NOg)g. The compounds are also named in the same manner as binary ionic compounds, with the... 

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