Solubility Chemistry Example 1

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Example 1

easy
Define solubility and explain how temperature generally affects the solubility of solids and gases in water.

Solution

  1. 1
    Solubility is the maximum amount of solute that dissolves in a given amount of solvent at a specific temperature, usually expressed in g/100 g water\text{g/100 g water} or g/L\text{g/L}.
  2. 2
    For most solid solutes: solubility increases with increasing temperature (e.g., sugar dissolves faster in hot water).
  3. 3
    For gaseous solutes: solubility decreases with increasing temperature (e.g., warm soda goes flat because dissolved CO2\text{CO}_2 escapes).

Answer

Solids: solubility increases with T. Gases: solubility decreases with T.\text{Solids: solubility increases with T. Gases: solubility decreases with T.}
Temperature affects the kinetic energy of particles. For solids, higher temperature helps overcome the lattice energy holding the solid together. For gases, higher temperature gives gas molecules enough energy to escape the liquid.

About Solubility

The maximum amount of a solute that can dissolve in a given quantity of solvent at a specific temperature and pressure, typically expressed as grams.

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