Typical question

An optically active isomer of A is dextrorotatry.A on dissolving in organic solvent starts isomerising into leavorotatory form by first order process as
A(+)→A(-)
The data for progress of reaction is :

Answer these on teh basis of above info.:-
Q1 What is half life of isomeriszation process?
Q2 What will be the optical rotation at half life
Q3 WHat will be optical rotation of soln after 1 hr

12 Answers

1
°ღ•๓яυΠ·

k=[2.303loga/(a-x)]/t
a=56
a-x=36
t=30
u egt k
itz fisrt order kinetics
so t(1/2)=.693/k

u can find rest

24
eureka123 ·

Are u getting t1/2 =90 min ?????????

1
°ღ•๓яυΠ·

m gettin it as 47. 1 ...............may b calc mistake wait will try agin

24
eureka123 ·

me too something in this range...........but answer is 90 minutes.........

1
°ღ•๓яυΠ·

a=100 a-x=80

24
eureka123 ·

How a=100 ??????????

1
°ღ•๓яυΠ·

a=rinfi -r0
a-x =rinfi -r t
they cum out 2b negative bt as both cum 2 b negative it gets canceld

24
eureka123 ·

plzzz explain...a=rinfi -r0

1
°ღ•๓яυΠ·

r infi means rotation at infinity
r 0 means rotation at t=0 and rt means roration at t u can refer arihant 4 dat itz a solved eg (similar type)

24
eureka123 ·

plzzzzz dont leave this in b/w !!!!!!!!!!!!!!!

1
°ღ•๓яυΠ·

r infi means rotation at infinity
r 0 means rotation at t=0 and rt means roration at t u can refer arihant 4 dat itz a solved eg (similar type)

24
eureka123 ·

i dont have arihant.................

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