Two clear, sealed beakers are kept at the same temperature. • Beaker A contains solid…

CHEMISTRY · Multi-part · A Level · Chemistry · Bonding · Bonding

Problem

Two clear, sealed beakers are kept at the same temperature. • Beaker A contains solid sucrose (C₁₂H₂₂O₁₁) stirred into liquid water until a homogeneous solution forms. • Beaker B contains an equal mass of liquid carbon tetrachloride (CCl₄) added to liquid water; after gentle stirring, two distinct liquid layers remain. Assume no chemical reactions occur. Answer the following about the particulate-level interactions responsible for the different observations. (a) Describe the dominant intermolecular forces that exist (i) between sucrose and surrounding water molecules in Beaker A and (ii) between CCl₄ and water molecules in Beaker B. (b) Explain, in terms of relative strength and compatibility of intermolecular forces, why sucrose forms a single homogeneous phase with water whereas CCl₄ does not. (c) Draw or describe a particulate-level representation for a small region inside Beaker A. Your diagram or description must: • Show at least two intact sucrose molecules and several surrounding water molecules. • Indicate the orientation of water molecules relative to one specific hydrogen-bond donor or acceptor site on sucrose. • Represent hydrogen bonds with dashed lines.

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