Multiple Choice
Which principle best explains why some solutes are soluble in water while others are soluble in cyclohexane?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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In which of the following scenarios will a salt dissolve faster in water?
A
Large salt crystals are used without crushing.
B
The salt is stirred while dissolving.
C
The salt is added to water saturated with another salt.
D
The salt is added to cold water and left undisturbed.
Verified step by step guidance1
Understand that the rate at which a salt dissolves in water depends on factors such as surface area, temperature, stirring, and saturation of the solution.
Recognize that stirring increases the interaction between the salt and water molecules by moving fresh solvent to the salt surface, which enhances the dissolution rate.
Note that large salt crystals have less surface area exposed to water compared to crushed or smaller crystals, so they dissolve more slowly.
Understand that adding salt to water already saturated with another salt reduces the solvent's capacity to dissolve more salt, slowing down dissolution.
Realize that cold water slows molecular motion, reducing the rate of dissolution, and leaving the solution undisturbed prevents fresh solvent from contacting the salt surface, both slowing the process.
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