Multiple Choice
Which of the following processes occurs when water dissolves sugar?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Sugars are polar substances. Which action would make sugar more soluble in water?
A
Decreasing the temperature of the water
B
Adding salt to the water
C
Increasing the temperature of the water
D
Adding oil to the water
Verified step by step guidance1
Understand that sugar is a polar substance, and water is also polar, so sugar dissolves well in water due to 'like dissolves like' principle.
Recall that solubility of most solids, including sugar, generally increases with increasing temperature because higher temperature provides more kinetic energy to break intermolecular forces.
Analyze the options: decreasing temperature usually reduces solubility; adding salt can cause a 'salting out' effect, reducing sugar solubility; adding oil, a nonpolar substance, does not help dissolve polar sugar.
Conclude that increasing the temperature of the water increases sugar's solubility by enhancing molecular motion and interaction between sugar and water molecules.
Therefore, the action that makes sugar more soluble in water is increasing the temperature of the water.
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