Saturday 16 March 2013

POLARIMETRY - Q6


6) How does the optical activity depend on (i) wavelength, and (ii)temperature?
Ans: 
(i) As the wavelength increases, optical activity decreases.
(ii) As the temperature increases, optical activity decreases. Temperature dependence of specific rotation is for sugar solutions as follows: 
a(t) = a(20 C)[1 – 0.000471 (t – 20.0)]

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