Multiple Choice
Which of the following solvents would be best to dissolve pentane?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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According to general solubility rules, which factor typically needs to increase to make a solid substance more soluble in water?
A
Temperature
B
Volume of solvent
C
pH
D
Pressure
Verified step by step guidance1
Understand that solubility refers to the amount of a substance (solute) that can dissolve in a solvent (like water) at a given temperature and pressure.
Recall the general solubility rules which state that for most solid substances, solubility increases as temperature increases because higher temperature provides more energy to break intermolecular forces in the solid.
Recognize that volume of solvent affects the total amount of solute that can dissolve but does not change the intrinsic solubility (concentration at saturation).
Note that pH can affect solubility only for substances that react with H+ or OH- ions, but it is not a general factor for all solids.
Understand that pressure mainly affects the solubility of gases, not solids, so increasing pressure does not typically increase the solubility of a solid in water.
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