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Anuradha posted an Question
June 16, 2020 • 17:49 pm 30 points
  • IIT JAM
  • Chemistry (CY)

An unknow compound weighing 4.2 gm is dissolved in enough carbon tetrachloride to make a total volume of 250 c.c. the observed rotation of this solution is +357

An unknow compound weighing 4.2 gm is dissolved in enough carbon tetrachloride to make a total volume of 250 c.c. The observed rotation of this solution is +357.75 in a 25 dm cell using the sodium D ine. But if 42 gm is dissolved in 125 ce observed rotation i1s +355.50°.Calculate specific rotation for this compound. 16. Ygawe an c1 +20.09 A mixture ot)

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    Lingareddy 1

    Change in Concentration =4.2/125 -4.2/250 C=4.2/250=0.0168 Change in rotation =355.5-357.5= -2.25 Specific rotation = -2.25/.0168*25 =-5.357

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    Anuradha Bhogaonkar

    thank you but ans is still wrong

    eduncle-logo-app

    what is the answer

    eduncle-logo-app

    Ans is -5.357° but I don't know the solution

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