Question

which factor influences both solubility and the rate of dissolution?
○ pressure
○ temperature
○ particle size
○ nature of solvent

Explanation:

• Pressure: Affects solubility of gases (Henry's law) but not rate of dissolution of solids/liquids much, so not for all solutes.
• Temperature: For solubility, generally increases solubility of solids (exceptions exist) and affects gas solubility oppositely. For rate of dissolution, higher temp increases collision frequency, speeding dissolution. So it impacts both.
• Particle size: Affects rate of dissolution (smaller size = faster rate) but not solubility (solubility is about maximum amount, not speed).
• Nature of solvent: Affects solubility (like "like dissolves like") but doesn't directly impact the rate of dissolution (rate is about how fast, not how much can dissolve).

Answer:

B. temperature