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Ch.2 - Atoms, Molecules, and Ions
Brown - Chemistry: The Central Science 14th Edition
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Tutti i libri di testoBrown 14th EditionCh.2 - Atoms, Molecules, and IonsProblema 65b,c,d
Capitolo 2, Problema 65b,c,d

Predict whether each of the following compounds is molecular or ionic: (b) CH3OCH3 (c) Mg(NO3)2 (d) H2S

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Step 1: Understand the difference between molecular and ionic compounds. Molecular compounds are formed by covalent bonds between nonmetals, while ionic compounds are formed by the electrostatic attraction between cations and anions, typically involving a metal and a nonmetal.
Step 2: Identify the elements present in the compound CH3OCH3. This compound consists of carbon (C), hydrogen (H), and oxygen (O).
Step 3: Determine the types of elements involved. Carbon, hydrogen, and oxygen are all nonmetals.
Step 4: Consider the bonding in the compound. Since all the elements are nonmetals, they are likely to form covalent bonds with each other.
Step 5: Conclude that CH3OCH3 is a molecular compound because it is composed of nonmetals bonded covalently.

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Molecular Compounds

Molecular compounds are formed when two or more nonmetals share electrons through covalent bonds. They typically have low melting and boiling points and can exist in various states (solid, liquid, gas) at room temperature. The presence of specific elements, such as carbon and hydrogen, often indicates a molecular compound.
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Naming Molecular Compounds

Ionic Compounds

Ionic compounds are formed when metals transfer electrons to nonmetals, resulting in the formation of charged ions that attract each other due to electrostatic forces. These compounds usually have high melting and boiling points and are often soluble in water. The presence of a metal and a nonmetal in a compound typically suggests it is ionic.
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Ionic Compounds Naming

Chemical Structure and Bonding

The chemical structure of a compound determines its classification as molecular or ionic. In the case of CH3OCH3 (dimethyl ether), the structure consists of covalent bonds between carbon, hydrogen, and oxygen atoms, indicating it is a molecular compound. Understanding the arrangement of atoms and the types of bonds formed is crucial for predicting the nature of a compound.
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Chemical Bonds
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