Lab 06 new - INTRODUCTION Objective To determine the...

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Objective To determine the specific rotation of cane sugar solution . To determine the rate constant of the hydrolysis of cane sugar . Theory The specific rotation [ α ] t λ where α is the angle through which the plane of rotated by a column of solution 100 mm in length, containing 1g of substance per cm 3 at 20 ° C. In presence of H + ions , an aqueous solution of cane sugar breaks down into optically active glucose and fructose . Sucrose Glu e Fructose C H O H O H C H O C H O H 12 22 11 2 6 12 6 6 12 6 + + + + + → + cos The total change in rotation ( α o - α ) will be proportional to the initial concentration of cane sugar ( α o , α t and α are observed angles of rotation). The concentration of cane sugar remaining at time t will be proportional to :- ( α o - α ) - ( α o - α t ) = ( α t - α ) A plot of ln ( α o - α ) / ( α t - α ) against t gives a straight line of slope equals the first order rate constant k . PROCEDURE
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This note was uploaded on 04/13/2011 for the course CHEM 311 taught by Professor Alial-habib during the Fall '09 term at King Fahd University of Petroleum & Minerals.

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Lab 06 new - INTRODUCTION Objective To determine the...

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