(a) Amina observed that crystals of copper sulphate are formed in the solution, when a
saturated solution of copper sulphate has cooled. Will the solution be still remained as
saturated? Why?
(b) Calculate the mass of sodium sulphate required to prepare its 20% (mass by mass
%) solution in water, if mass of the solution is 80 g​
Answers: 2
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(a) Amina observed that crystals of copper sulphate are formed in the solution, when a
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