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The Nature of Solutions


    1.    Describe the properties of a solution.

    2.    Identify the different types of solutions.

Key Terms:

    solution        solute        solvent        soluble        insoluble        alloy        miscible        immiscible        aqueous solution

Notes: (15-1)

Solutions are homogenous (looks the same) mixtures of substances in a single state.  Solutions can exist in any phase and have certain properties..

  1. The particles in a solution are very small - atoms, ions, molecules
  2. Particles in a solution are evenly distributed - one part of the solution looks has the same molecular make-up as another
  3. Solutions do not separate under normal conditions

Common definitions:

solute - substance dissolved in a solution
solvent - substance that does the dissolving
soluble - substance that is capable of dissolving
insoluble - substance that does not dissolve
alloy - solution consisting of 2 or more metals
miscible - liquids that can mix in any amount
immiscible - substances that cannot mix with a liquid in any proportions
aqueous - any solution containing water


Types of Solutions

Solutions can come in any phase (solid, liquid, gas).   Each solution carries its own set of properties.

   Solid solution

had to have been in the liquid phase at some point in time

    Gaseous solution

all mixtures of gases are solutions
each gas spread out uniformly in the space provided
gases diffuse through each other easily due to the space between the molecules
the properties of gaseous solutions are proportional to the percentages of the gases involved

    Liquid solutions

most solution exist in this form
the liquid is most commonly the solvent
the solute can be liquid, gas or solid
liquid solvents can usually only hold a certain amount of a solute
solutions containing water are said to be aqueous
water is the universal solvent
if ions are dissolved in the water the solution becomes an electrolyte




Last modified: March 24, 2003