شرح درس
Concentration of Solutions
CHEMISTRY - Secondary 1
In This part we will study
Concentrated solution: The solution in which the amount of the solute is large (not larger than the solvent).
Diluted solution: The solution in which the amount of the solute is small in proportion to the amount of the solvent.
In this section we will describe several methods for expressing the concentration which are:
 Percentage (%) :
This method is suitable to express concentration for food and medicines.
A- Mass percentage (m/m)
Mass percentage : Is the percentage of the mass of solute in 100 g of solution.
Law :

Application
Preparation of an aqueous solution of sucrose 10% (m/m).

B- Volume percentage (v/v)
Volume percentage : It is percentage of the volume of solute in 100 mL of solution.
B- Volume percentage (v/v)

Law :
Application
Preparation of an aqueous solution of ethanol 25 % (V /V).

Best wishes to you
Mr.Ahmed Elbasha

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