How glucose is prepared from cane sugar? Write the formula of the complex copper (II) hexacyano ferrate(II).

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Solution

Preparation of glucose from cane sugar:
Cane sugar (sucrose) is boiled with dilute hydrochloric acid or sulphuric acid. Cane sugar is hydrolyside into equimolar mixture of glucose and fructose.
$C_{12} H_{22} O_{11} cane sugar + H_{2} O d i l H C l o r H_{2} S O_{4} - ---------- \to Δ C_{6} H_{12} O_{6} glucose + C_{6} H_{12} O_{6} fructose$
The mixture is cooled and alcohol is added during cooling. Glucose crystallises out and fructose remains in solution. Glucose crystals are separated by filtration.
The formula of the complex copper (II) hexacyano ferrate(II) is $C u_{2} [F e (C N)_{6}]$

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