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A solution of 1.73g of 'A' in 100 "cc" of water is found to be isotonic with a 3.42% (wt./vol.) solution of sucrose (C_(12)H_(22)O_(11)). Calculate molecular weight of A. (C_(12)H_(22)O_(11)=342) |
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Answer» SOLUTION :We know that the isotonic SOLUTIONS have the same molar CONCENTRATION (i.e., moles/lit) LET the molecular WEIGHT of A be M Moles of `A=(1.73)/(M)` `:.` molar conc.of A (moles/litre) `=(1.73)/(M)xx(1000)/(100)=(17.3)/(M)` Molar conc.of sucrose `=(3.42)/(342)xx(1000)/(100)=0.1` `:.(17.3)/(M)=0.1`, `M=173` |
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