Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

leena1996

  • one year 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!

  • This Question is Closed
  1. chmvijay
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    WOW Very interesting question i Love it :)

  2. leena1996
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @chmvijay will u plz solve it.....

  3. nincompoop
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    this is a theoretical experiment and not an actual experiment, right?

  4. leena1996
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yup it is theorotical just use chemical kinetics and answer this @nincompoop

  5. chmvijay
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hope @nincompoop answers this :)

  6. leena1996
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    me too hopind the same......lets see...its not supposed to be very difficult .... it is class 12 question....ISC board @chmvijay

  7. leena1996
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    *hoping

  8. leena1996
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok here's the only hint formula\[k =\frac{ 2.303 }{ t }\log_{10}\frac{ r_{0}-r _{\infty} }{ r_{t}-r _{\infty} } \]

  9. leena1996
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 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

  10. chmvijay
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok fine me to leaving to BED will see it hope @nincompoop solves this :)

  11. nincompoop
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I can't… LOL

  12. nincompoop
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @electrokid

  13. leena1996
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I guess i will have to ask this to my instructor...!

  14. electrokid
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    in the formula \[k={2.303\over t}\log_{10}\frac{r_0-r_\infty}{r_t-r_\infty}\] 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, \[ t={2.303\over 0.00157}\log_{10}\frac{13.1-(-3.8)}{0-(-3.8)}\\ \Large\boxed{t=950\,{\rm min}\\ t=15\,{\rm hr}\;50\,{\rm min}} \]

  15. leena1996
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @electrokid Thanks a lot!!! It was great help....

  16. chmvijay
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @electrokid nice :)

  17. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.