Question

A 15cm tube containing cane sugar shows optical rotation 7°.the specific rotation of the solution is 66°.calculate the strength of the solution?

Answer 1

Answer:

polarization is turned through

traversing a length of 20 cm of 10% sugar solution.

Answer 2

Answer:

The strength of the solution, c = 0.0707 g/cc

Explanation:

The intensity of optical activity is expressed in terms of a quantity, called specific rotation which is defined by an equation that relates the angle through which the plane is rotated, the length of the light path through the sample, and the density of the sample (or its concentration if it is present in a solution).

s= specific rotation

l= length of tube

c = strength of solution

θ = optical rotation

formula used :

The specific rotation of the solution is given as,

s= 10θ/l*c

66= (10*7)/(15*c)

c= 70/15*66

c= 0.0707 g/cc

The strength of the solution,c= 0.0707 g/cc.

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