Question

Which Method is better for recovering sugar from sugar solution: evaporation or crystallization? Give reason For your answer.

Answer 1

Crystallization is a unitary operation of chemical engineering consisting in isolating a product in the form of crystals. Crystallization is one of the most ancient physical operations practiced, with the evaporation of seawater to isolate salt. So, Crystallization is better  method for recovering sugar from sugar solution. It is because:

(1) When we recover sugar from sugar solution with evaporation process then some impurities will be there but by the crystallization process no impurities will be there.It will be pure.

(2) We know sugar discompose due to heating. So, when we obtain sugar from water then there will be water molecules but some sugar molecules will be lost because sugar discompose due to heating.

Hence Proved ! Crystallization is best method.

Answer 2

Crystallization is considered as a better technique to separate sugar from sugar solution.

Reason:-
Crystallization is a solid-liquid separation process in which solute get converted into the solid state from.the liquid solution. In this process, we get solid in the pure crystallized form. 

Some sugar molecules can decompose due to heating in the process of Evaporation.

In crystallization, we get sugar in pure crystallized form while in Evaporation impurities are present.

Hence, Crystallization is better method than evaporation to obtain sugar from sugar solution