6. a) It was obvious that most of you obtained a contaminated sample of beta naphthol. Look up the solubility of beta naphthol and benzoic acid in both cold and hot water. Will a single recrystallization with water be able to purify 1.0 gram beta naphthol (remove benzoic acid as an impurity). In other words, what is the minimum benzoic acid that beta naphthol can have above which more than one recrystallisation will be required. b) What would be a suitable recrystallisation solvent (or mixture of solvents) for beta naphthol? c) What is the minimum beta naphthol that could be present in benzoic acid above which a more than a single recrystallisation would be required?
Carbohydrates
Carbohydrates are the organic compounds that are obtained in foods and living matters in the shape of sugars, cellulose, and starch. The general formula of carbohydrates is Cn(H2O)2. The ratio of H and O present in carbohydrates is identical to water.
Starch
Starch is a polysaccharide carbohydrate that belongs to the category of polysaccharide carbohydrates.
Mutarotation
The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of the α- and β- glucose anomers upon its dissolution in the solvent water. This process is usually seen in the chemistry of carbohydrates.
L Sugar
A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotating the polarized light’s plane in the direction anticlockwise. L isomers are one of the 2 isomers formed by the configurational stereochemistry of the carbohydrates.
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