Question

Why blood and milk are not considered as solutions ?

Answer 1

• A solution is a homogeneous mixture of substances. The solution consists of a solvent and solute. The solute is the substance that is dissolved in the solvent.
• The amount of solute that can be dissolved in the solvent is called its solubility. They cannot be separated by mere mechanical filtration.
  However, milk and blood are heterogeneous solutions.
• They contain particles suspended in them. These particles are not completely soluble. So they are considered colloidal suspensions.
• They are also known as emulsions. Emulsions are a fine dispersion of minute droplets of one liquid in another in which it is not soluble or miscible.