Some substances made up entirely of nonmetal atoms are soluble in water, while others are not. Use the bonding models to explain why. How might the model for network covalent bondi... Some substances made up entirely of nonmetal atoms are soluble in water, while others are not. Use the bonding models to explain why. How might the model for network covalent bonding explain the incredible hardness of a diamond? Both sugar and salt dissolve in water, but they bond differently. Use the models to explain how these two substances might be different after they dissolve. Which bonding model would you predict for the following substances: KI, CO2, Au, Cl2? Which of the bonding models are found in elemental substances? Explain using examples. If you have the chemical formula of a substance, what can you figure out about its properties? Explain. Use the compound silver nitrate, AgNO3, as an example.
Understand the Problem
The questions are asking for explanations and applications of bonding models in chemistry, specifically regarding solubility, hardness of materials, and properties derived from chemical formulas.
Answer
1. Covalent and network bonds affect solubility. 2. Diamond's hardness is due to network covalent bonding. 3. Sugar and salt dissolve via hydrogen bonding and ion dissociation, respectively. 4. KI: Ionic, CO2: Covalent, Au: Metallic, Cl2: Covalent. 5. Elements use metallic, covalent, or network bonding.
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Nonmetal solubility: Some nonmetal atoms form covalent bonds creating molecules that can interact with water (e.g., sugar), while others form strong network covalent bonds (e.g., graphite) that do not easily dissolve.
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Hardness of diamond: Diamonds have a network covalent structure with strong carbon-carbon bonds throughout, giving them extreme hardness.
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Sugar and salt in water: Sugar dissolves by forming hydrogen bonds with water, whereas salt dissociates into ions.
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Bonding models:
- KI: Ionic
- CO2: Covalent molecular
- Au: Metallic
- Cl2: Covalent molecular
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Elemental bonding models: Elements can form metallic (e.g., gold), covalent molecular (e.g., chlorine gas), or network covalent (e.g., diamond) structures.
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Predicting properties: AgNO3 is ionic, suggesting high solubility in water and conductance in solutions.
Answer for screen readers
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Nonmetal solubility: Some nonmetal atoms form covalent bonds creating molecules that can interact with water (e.g., sugar), while others form strong network covalent bonds (e.g., graphite) that do not easily dissolve.
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Hardness of diamond: Diamonds have a network covalent structure with strong carbon-carbon bonds throughout, giving them extreme hardness.
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Sugar and salt in water: Sugar dissolves by forming hydrogen bonds with water, whereas salt dissociates into ions.
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Bonding models:
- KI: Ionic
- CO2: Covalent molecular
- Au: Metallic
- Cl2: Covalent molecular
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Elemental bonding models: Elements can form metallic (e.g., gold), covalent molecular (e.g., chlorine gas), or network covalent (e.g., diamond) structures.
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Predicting properties: AgNO3 is ionic, suggesting high solubility in water and conductance in solutions.
More Information
Solubility depends on interaction with water molecules, while hardness in network covalent structures is due to strong bonding. Understanding different bond types helps predict how substances will behave.
Tips
A common mistake is confusing ionic and covalent bonds. Remember separate ions form in ionic substances when dissolved, but not in covalent substances.
Sources
- Chemistry and Water Solubility - coursesidekick.com
- Bond Types and Properties - meettheelements.files.wordpress.com
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