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leena1996
 2 years ago
The following data were obtained in an experiment on inversion of cane sugar in the presence of 0.1N HCl.
Time(min) 0 60 120 180 360 infinity
Angle of
Rotation 13.1 11.6 10.2 9.0 5.87 3.8
After what time would you expect a zero reading in Polarimeter........its urgent can someone help me fast!
leena1996
 2 years ago
The following data were obtained in an experiment on inversion of cane sugar in the presence of 0.1N HCl. Time(min) 0 60 120 180 360 infinity Angle of Rotation 13.1 11.6 10.2 9.0 5.87 3.8 After what time would you expect a zero reading in Polarimeter........its urgent can someone help me fast!

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chmvijay
 2 years ago
Best ResponseYou've already chosen the best response.0WOW Very interesting question i Love it :)

leena1996
 2 years ago
Best ResponseYou've already chosen the best response.0@chmvijay will u plz solve it.....

leena1996
 2 years ago
Best ResponseYou've already chosen the best response.0yup it is theorotical just use chemical kinetics and answer this @nincompoop

chmvijay
 2 years ago
Best ResponseYou've already chosen the best response.0hope @nincompoop answers this :)

leena1996
 2 years ago
Best ResponseYou've already chosen the best response.0me too hopind the same......lets see...its not supposed to be very difficult .... it is class 12 question....ISC board @chmvijay

leena1996
 2 years ago
Best ResponseYou've already chosen the best response.0ok here's the only hint formula\[k =\frac{ 2.303 }{ t }\log_{10}\frac{ r_{0}r _{\infty} }{ r_{t}r _{\infty} } \]

leena1996
 2 years ago
Best ResponseYou've already chosen the best response.0@nincompoop @chmvijay @Frostbite i got to go back to work.......if you guys get the answer plz do reply here........thanks! Bye will be back soon

chmvijay
 2 years ago
Best ResponseYou've already chosen the best response.0ok fine me to leaving to BED will see it hope @nincompoop solves this :)

leena1996
 2 years ago
Best ResponseYou've already chosen the best response.0I guess i will have to ask this to my instructor...!

electrokid
 2 years ago
Best ResponseYou've already chosen the best response.2in the formula \[k={2.303\over t}\log_{10}\frac{r_0r_\infty}{r_tr_\infty}\] k = rate of reaction (interms of change in optical activity) t = time r = angles of rotation from this, we calculate the rate of reaction \[ k={2.303\over120}\log_{10}\frac{13.1(3.8)}{10.2(3.8)}\\ k=1.57\times10^{3} \] use the equation again, to find "t" when r_t=0 rearranging, the terms, \[ t={2.303\over 0.00157}\log_{10}\frac{13.1(3.8)}{0(3.8)}\\ \Large\boxed{t=950\,{\rm min}\\ t=15\,{\rm hr}\;50\,{\rm min}} \]

leena1996
 2 years ago
Best ResponseYou've already chosen the best response.0@electrokid Thanks a lot!!! It was great help....
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