Ch.3 - Chemical ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Which chemical formula is incorrectly matched with its name?

A. iron(III) bromide: FeBr3
B. nitrous acid: HNO2
C. dichlorine heptoxide: Cl2O7
D. calcium(III) phosphate: Ca3(PO4)2
E. zinc chloride: ZnCl2


We're being asked to determine which of the given is named incorrectly. 

Let's first review the rules for naming compounds.

Ionic compounds - are usually made of metals and non-metals. 

The rules for naming ionic compounds are as follows:

1. The metal keeps its name and is named and written first.

– For transition metals, we use Roman numerals to denote its charge.

2. The nonmetal/polyatomic ion keeps its base name but has its ending changed to –ide.

Covalent compound - composed of nonmetals.

The rules for naming covalent compounds are as follows:

1. The first nonmetal is named normally and uses all numerical prefixes except mono.

2. The second nonmetal keeps its base name but has its ending change to –ide. It will also use any of the numerical prefixes.

The numerical prefixes are:

Mono – 1     Di – 2

Tri – 3          Tetra – 4

Penta – 5     Hexa – 6

Hepta – 7     Octa – 8

Nona – 9      Deca – 10


Rules for Naming Binary Acids:

a. The prefix will be hydro-

b. Use the base name of the nonmetal (anion)

c. The suffix will be -ic acid

Rules for Naming Oxyacids or Oxoacids:

a. If the polyatomic ion ends with -ate then change the ending to -ic acid

b. if the polyatomic ion ends with -ite then change the ending to -ous acid

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