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A 5% solution of cane sugar (M.W.=342) i...

A 5% solution of cane sugar (M.W.=342) is isotonic with 1 % solution of substance X. The molecular weight of X is

A

342

B

171.12

C

65.6

D

136.8

Text Solution

Verified by Experts

The correct Answer is:
C
Isotonic solutions: Same osmotic pressure (i.e., same `C_("effective")` and assume `c~~m`)
`rArr (5//342)/(95//1000) = (1//Mw_(2))/(99//1000) rArr Mw_(2)=65.64 g "mol"^(-1)`
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