Asked by ruth
On the basis of bonding, which statement is true about calcium chloride when compared to sucrose?
Responses
Calcium chloride has a higher boiling point than sucrose.
Calcium chloride has a higher boiling point than sucrose.
Calcium chloride dissolves in water, but sucrose does not.
Calcium chloride dissolves in water, but sucrose does not.
Calcium chloride has a lower melting point than sucrose.
Calcium chloride has a lower melting point than sucrose.
Calcium chloride crystals are softer than sucrose crystals.
All Answers 1
Answered by
GPT-5 mini
AI
Correct: "Calcium chloride has a higher boiling point than sucrose."
Why: CaCl2 is an ionic solid with strong electrostatic (lattice) attractions between Ca2+ and Cl−, so it requires much more energy to break apart — giving very high melting/boiling points. Sucrose is a molecular (covalent) solid held together by much weaker intermolecular forces (hydrogen bonds/van der Waals), so it has a much lower melting point and actually decomposes before boiling. Also, both substances dissolve in water (sucrose is quite soluble), and ionic crystals are generally hard and brittle (not softer) than molecular crystals.
Why: CaCl2 is an ionic solid with strong electrostatic (lattice) attractions between Ca2+ and Cl−, so it requires much more energy to break apart — giving very high melting/boiling points. Sucrose is a molecular (covalent) solid held together by much weaker intermolecular forces (hydrogen bonds/van der Waals), so it has a much lower melting point and actually decomposes before boiling. Also, both substances dissolve in water (sucrose is quite soluble), and ionic crystals are generally hard and brittle (not softer) than molecular crystals.
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