Rotation of the polarisation plane through sugar solutions

VC3.3.4.1
Rotation of the polarisation plane through sugar solutions
Rotation of the polarisation plane through sugar solutions

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Description

Experiment C3.3.4.1 demonstrates that optically active substances can rotate the plane of a linerally polarised beam of light by a specific value. For a given cuvette length d, the angle of rotation α of an optically active solution is proportional to the concentration c of the solution.

To determine the concentration c of the solution, the following expression applies:

specific rotation: [α] (°· ml/g · dm)

The angle of rotation is given as a positive (+) value when the polarisation plane of the light directed toward the observer rotates clockwise (to the right). Counterclockwise rotation is referred to as rotation to the left and expressed as a negative number, hence preceded by a minus sign (-).

Components of equipment sets

1 657591  8  Polarimeter LD
1 OHCR221  4  Compact Balance CR221, 220 g : 0.1 g LD
1 666963  8  Spoon-ended spatula, stainless steel, 120 mm LD
3 665793 Volumetric flask, Boro 3.3, 100 ml LD
3 664153  4  Watch glass dish 60 mm Ø LD
3 665009  4  Funnel PP 75 mm Ø LD
3 664137  4  Beaker, Boro3.3, 100 ml, tall LD
1 6721100  4  D(+)-Glucose, 100 g LD
1 6720700  4  D(-)-Fructose, 50 g LD
1 6746050  4  D(+)-Sucrose, 100 g LD

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) C3.3.4.1 Rotation of the polarisation plane through sugar solutions
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