What kind of colloidal solution is butter? Name a technique to separate butter from cream

CBSE Class 9 CBSE Class 9 Science
1
  1. What kind of colloidal solution is butter? Name a technique to separate butter from cream.
  2. Calculate the amount of sodium sulphate require to prepare its 20% (by mass) solution in 100 g of water.
2
  1. Butter belongs to a class of gel of colloidal solution in which dispersion medium is solid and dispersed phase in liquid. Butter can be separated from cream through the process of centrifugation.
  2. Mass % of sodium sulphate (Na2SO4) in solution = 20%
    Mass of the solvent = 100 g
    Let the mass of solute (Na2SO4) = x g
    Mathematically, we have
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    Hence, 25 g of sodium sulphate is required.