Please answer all: Sodium chloride: draw the Lewis structure, determine the electron geometry, determine the molecular geometry, list the bond angles present, list if it is polar or nonpolar, list the intermolecular forces present. Draw the structures of alkanes and cycloalkanes, and identify the functional groups.
The Correct Answer and Explanation is:
Let’s proceed step-by-step for each part of the question:
Sodium Chloride (NaCl):
Lewis Structure:
Sodium chloride consists of a sodium ion (Na⁺) and a chloride ion (Cl⁻).
- Sodium atom loses one electron becoming Na⁺.
- Chlorine atom gains one electron becoming Cl⁻.
The Lewis structure shows Na⁺ and Cl⁻ ions separately:
Na⁺ [ ] Cl⁻ [:Cl:]
(Chloride ion has 8 electrons, represented by four pairs of dots.)
Electron Geometry:
Since NaCl is an ionic compound with separate ions, traditional electron geometry does not apply as in covalent molecules. The ions are arranged in a crystal lattice.
Molecular Geometry:
Ionic compounds like NaCl do not have a molecular geometry in the conventional sense because they form a repeating lattice structure.
Bond Angles:
No bond angles apply to NaCl as an individual pair of ions. In a crystal, ions arrange to maximize electrostatic attractions.
Polarity:
The compound is ionic, which makes it polar due to the full transfer of electrons.
Intermolecular Forces:
The primary intermolecular force is ion-ion interaction (electrostatic force).
Alkanes and Cycloalkanes:
Structures:
- Alkanes (example: butane, C₄H₁₀): nginxCopyEdit
H H H H | | | |H–C–C–C–C–H
| | | |
H H H H
Alkanes are saturated hydrocarbons containing only single bonds (C–C and C–H).
- Cycloalkanes (example: cyclohexane, C₆H₁₂): markdownCopyEdit
_______ / \| |
_______/
Cyclohexane forms a ring structure with six carbon atoms and two hydrogen atoms attached to each carbon.
Functional Groups:
Both alkanes and cycloalkanes contain the alkane functional group, characterized by single C–C and C–H bonds.
Explanation:
Sodium chloride is an ionic compound formed from the reaction between sodium and chlorine. Sodium donates one electron, resulting in a positively charged sodium ion (Na⁺), while chlorine accepts one electron, forming a negatively charged chloride ion (Cl⁻). The Lewis structure reflects this transfer of electrons with sodium depicted as Na⁺ and chlorine as Cl⁻ with a full octet.
Since sodium chloride consists of ions rather than discrete molecules, concepts like electron geometry and molecular geometry do not apply as they would for covalent molecules. Instead, NaCl forms a crystalline lattice where each ion is surrounded by oppositely charged ions, maximizing electrostatic attractions. Consequently, bond angles are not defined for individual ion pairs.
The ionic nature of NaCl makes it highly polar, as there is a complete separation of charges. The intermolecular forces present are strong electrostatic (ion-ion) forces, which contribute to its high melting and boiling points, as well as its solubility in water.
Alkanes are hydrocarbons containing only carbon-carbon single bonds and carbon-hydrogen bonds, making them saturated compounds. An example is butane (C₄H₁₀), which has a linear chain of four carbon atoms. Cycloalkanes are similar but the carbon atoms are arranged in a ring structure, such as cyclohexane (C₆H₁₂). The functional group present in both alkanes and cycloalkanes is the alkane group, characterized by single bonds. These compounds are nonpolar and primarily exhibit dispersion (London) forces as their intermolecular interactions.
