Solutions and Solubility Flashcards
Solution
A homogeneous mixture of 2 or more substances (uniform throughout)
Solvent
Any Substance that has another substance dissolved in it (usually the larges amount)
Solute
A substance dissolved in the solvent.
Solutions
Unlike pure substances, can have variable compositions, therefore different ratios of solvent to solute.
Aqueous Solution
Water is the solvent
Miscible Liquids
Can be combined in any proportion and are readily dissolvable
Immiscible Liquids
Liquids that do not readily dissolve
Saturated Solutions
Formed when no more solute will dissolve and excess solute is present
Unsaturated Solutions
Solutions that are not yet saturated, more solute can dissolve.
Solubility
The maximum amount of a solute that can be dissolved in a given quantity of a solvent at a given temperature.
Rate of Dissolving
The speed at which the solute dissolves into a solvent.
Factors Affecting the Rate of Dissolving
- Heating (increases the kinetic energy of the solute: higher temperature= faster dissolving)
- Agitation/Stirring (Allows the unsaturated portions of the solution to come in contact with the solute: disturbs equilibrium process)
Factors Affecting Solubility
- Temperature (solubility mostly increases with heat)
- Pressure (Increasing pressure increases solubility in gases and liquids but is not possible for solids)
- Molecule Size (Smaller molecules are more soluble than larger ones)
- Polarity (Polar solutes dissolve better in polar solvents and non-polar solutes in non-polar solvents)
Concentration of a mass: volume %/ percent (m/v)
A ratio of the mass of a solute to the volume of a solution, expressed as a percentage
Concentration of a mass/ mass percent or percent (m/m)
A ratio of the mass of solute to the mass of a solution, expressed as a percentage.