Concentration of a solution

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The concentration of a solution is defined as: the amount of solute present in a given amount of solution. Concentration is generally expressed as the quantity of solute in a unit volume of solution.

A solution containing a relatively low concentration of solute is called dilute solution. A solution of high concentration is called concentrated solution. 
                                                            Quantity of solute
                              Concentration = -----------------------------
                                                            Volume of solution
WAYS OF EXPRESSING CONCENTRATION

There are several ways of expressing concentration of a solution:
     (a)  Percent by weight
     (b)  Mole fraction
     (c)  Molarity
     (d)  Molality
     (e)  Normality

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