Concentration of Solutions

• Concentration


  Can be Measured in g/dm³
• Finding the concentration of a solution

  1. Know the mass of the substance dissolved

  2. Know the volume of the solution

  3. Divide mass by volume to get concentration in units of mass/volume (e.g. g/dm³)
• Calculating concentration in g/dm³


  • 30 g of sodium chloride dissolved in 0.2 dm³ of water, concentration is 150 g/dm³
  • 15 g of salt in 500 cm³ of water, concentration is 30 g/dm³
• Formula triangle


  Used to rearrange the concentration formula to find mass or volume if concentration is known
• When measuring something, there is always some uncertainty in the measurement