3. Chemical Reactions

Polyatomic Ions

How to Memorize and Name Polyatomic Ions

Figuring out the Charge on Ions

Selenium, an element required nutritionally in trace quantities, 
forms compounds analogous to sulfur. Name the following 
ions: (a) SeO42-

Give the chemical formula for (d) sulphite ion

Naming Compounds with Polyatomic Ions

Give the systematic name for the following polyatomic ion.FO–

Elements in the same group of the periodic table often form 
oxyanions with the same general formula. The anions are 
also named in a similar fashion. Based on these observations, 
suggest a chemical formula or name, as appropriate, for each 
of the following ions: (d) hydrogen tellurate ion.

The formula for the sulfate ion, SO42–. If the term of “thio” means the replacement of an oxygen by a sulfur, what is the formula for the thiosulfate ion?

Polyatomic Ions Example 3

Polyatomic Ions Example 1

Give the systematic name for the following polyatomic ion.AsO42–

Give the formulas and charges of the following ions:
(a) Sulfite ion
(b) Phosphate ion
(c) Zirconium(IV) ion
(d) Chromate ion
(e) Acetate ion
(f) Thiosulfate ion

Elements in the same group of the periodic table often form 
oxyanions with the same general formula. The anions are 
also named in a similar fashion. Based on these observations, 
suggest a chemical formula or name, as appropriate, for each 
of the following ions: (b) SeO32-

The silicate ion is the silicon version of the carbonate ion. Based on this description, provide the structure of the silicate ion.

Give the chemical formula for (e) permanganate ion.

Give the systematic name for the following polyatomic ion.CO22–

 This formula and name are correct.  Be sure that the correct chemical symbol is used for each element in all compounds listed. 

lead(II) nitrite, Pb(NO2)2

ammonium sulfate, (NH4)2SO4

copper(II) sulfate pentahydrate, CuSO4 &#9642; 5 H2O

 Review the rules for writing formulas and naming ionic compounds. 

 Which of the following names and formulas are NOT paired correctly? 

Polyatomic Ions Example 2

Chemistry Lesson: Polyatomic Ions

Give the systematic name for the following polyatomic ion.IO3–

Name the following ions:
(a) Ba2+ 
(b) Cs+
(c) V3+
(d) HCO3-
(e) NH4 
(f) Ni2+ 
(g) NO2-
(h) ClO2 -
i) Mn2+
(j) ClO4-

What is a Polyatomic Ion?

Biggest Mistakes in Chemistry: Polyatomic Ions

What's a polyatomic ion?

Give the systematic name for the following polyatomic ion.NO2–

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Empirical Formula

The empirical formula gives the relative number of atoms.&nbsp;

Percent Yield

The Percent Yield determines how successful the product yield is in a chemical reaction.&nbsp;

Molecular Formula

The&nbsp;molecular formula gives the actual number of atoms.

Naming Ionic Compounds

An ionic compound is composed of a positive ion and a negative ion.&nbsp;

Functional Groups in Chemistry

The Functional Group is the portion of a molecule that is responsible for its chemical reactivity.&nbsp;

Naming Molecular Compounds

Molecular Compounds, also known as covalent compounds, contain only non-metals bonded together.&nbsp;

Naming Ionic Hydrates

An Ionic Hydrate is an ionic compound that is linked to at least one molecule of H2O.&nbsp;

Stoichiometry

Stoichiometry deals with the numerical relationship between compounds in a balanced chemical equation.

Writing Ionic Compounds

Determining the charges of a cation and anion are fundamental in Writing Ionic Compounds.

Polyatomic Ions are groups of multiple elements that possess a charge.

Balancing Chemical Equations

Balancing Chemical Equations is the first step in future chemical calculations.

Limiting Reagent

The Limiting Reagent represents the compound that is totally consumed in the reaction.&nbsp;

Combustion Analysis

Under Combustion Analysis, the empirical formula of a compound is determined through a combustion reaction.&nbsp;

Mass Percent

Mass Percent is the percentage of a particular element within a compound.&nbsp;

Combustion Apparatus

A Combustion Apparatus vaporizes a sample into gases to later determine its formula.

Naming Acids

Acids, for the most part, are covalent compounds that begin with a hydrogen.&nbsp;

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