Final answer:
The characteristic of a solvent related to its speed of evaporation is its volatility.
Step-by-step explanation:
The characteristic of a solvent that is related to its speed of evaporation is c. volatility. Volatility refers to how easily a substance vaporizes or evaporates.
A volatile solvent has a high vapor pressure and tends to evaporate readily, while a nonvolatile solvent has a low vapor pressure and evaporates more slowly.
For example, diethyl ether, acetone, and gasoline are volatile solvents, while mercury, ethylene glycol, and motor oil are nonvolatile solvents.