Question

A certain length of 5% solution causes the optical rotation of 200
. How much length of
10% solution of same substance will cause 350
rotation

Answer 1

The length would be 0.875 units.

Given:
Optical rotation: 200
Solution conc = 5%
To find: Length when 10% solution of same substance will cause 350
rotation.
Solution:
Optical rotation is the skill of a compound to alternate the plane of reverse light. This characteristic stands from an interplay of the electromagnetic wave of light with the irregular energetic fields produce for one electrons in a chiral particle.
Optical turn is the effect that is contingent upon the aggregation of chiral fragments and their microscopic construction in a element. Every ocular alive wealth has allure own specific turn.
The ocular turn is the angle by which the plane of dissemination is alternated when reverse light passes through a tier of a liquid.

Lets simplify the problem through formula,

$\alpha = 20/.05 * l\alpha =400/l\\400/l=35/0.10*l`l` = 0.875 l$
Hence we get our length as 0.875 l.

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