Polarimetry Principle The rotation of the plane of polarisation through a sugar solution measured with a half-shade polarimeter and the reaction rate constant for the inversion of cane sugar determined. Benefits - Even transparent fluids can change the properties of light passing them
- Find out how fast one type of sugar changes into another one
- Use optical methods, involving the plane of polarisation, to observe chemical processes
Tasks - To determine the specific rotation of cane sugar (sucrose) and lactose by measuring the rotation of various solutions of known concentration.
- To determine the reaction rate constant when cane sugar is transformed into invert sugar.
Learning objectives - Half-shade principle
- Optical rotatory power
- Optical activity
- Saccharimetry
- Specific rotation
- Reaction rate
- Weber-Fechner law
Scope of delivery |
Polarimeter, LED, 590 nm
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35907-99
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1
| |
Immersion thermostat Alpha A, 230 V
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08493-93
|
1
| |
External circulation set for thermostat Alpha A
|
08493-02
|
1
| |
Bath for thermostat, makrolon
|
08487-02
|
1
| |
Digital stopwatch, 24 h, 1/100 s and 1 s
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24025-00
|
1
| |
Crucible tongs, 200 mm, stainless steel
|
33600-00
|
1
| |
Beaker, 250 ml, plastic (PP)
|
36013-01
|
2
| |
Graduated cylinders, plastic, various sizes
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36629-01
|
2
| |
Graduated beaker, 1000 ml, plastic (PP)
|
36640-00
|
1
| |
Funnels, plastic, various sizes
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36891-00
|
1
| |
Spoon, with spatula end, 180 mm, plastic
|
38833-00
|
1
| |
Glass stirring rod, d = 8 mm, l = approx. 300 mm
|
40485-06
|
1
| |
Pipette with rubber bulb, long
|
64821-00
|
1
| |
D (+)-Sucrose 100 g
|
30210-10
|
1
| |
Hydrochloric acid 37 %, 1000 ml
|
30214-70
|
1
| |
Water, distilled 5 l
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31246-81
|
1
| |
D(+)-Lactose, powder 100 g
|
31577-10
|
1
| |
Balance OHAUS LG 311, 4 beams, 0...311 g
|
44007-31
|
1
| |
Tubing connector, ID 6-10mm
|
47516-01
|
2
|
|
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