Chemistry
(a) Define
(i) Henry’s law
(ii) Crystallization
(iii) Seeding
(b) State any three methods of crystallization.
Water
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Answer
(a) (i) Henry’s law — At any given temperature, the mass of a gas dissolved by a fixed volume of liquid is directly proportional to the pressure on the surface of the liquid.
(ii) Crystallization — It is a process by which crystals of a substance are obtained by cooling a hot saturated solution.
(iii) Seeding — It is a process of inducing crystallization by adding a crystal of a pure substance into its saturated solution.
(b) Three methods of crystallization are:
- By cooling a hot saturated solution gently
- By cooling a fused mass
- By sublimation
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