Some Basic Principles Of Organic Chemistry Question 103
Question: A compound has an empirical formula $ C_2H_4O $ . An independent analysis gave a value of 132.16 for its molecular mass. What is the correct molecular formula [Kerala PMT 2004]
Options:
A) $ C_4H_4O_5 $
B) $ C_{10}H_{12} $
C) $ C_7O_3 $
D) $ C_6H_{12}O_3 $
E) $ C_4H_8O_5 $
Show Answer
Answer:
Correct Answer: D
Solution:
Empirical formula weight $ C_2H_4O $
$ =(12\times 2+4+16)=44 $ Molecular formula $ =\frac{mol\text{.wt}}{eq\text{.formula wt}\text{.}}\times $ Emp.
Formula $ =\frac{132.1}{44}\times \text{Emperical formula} $
$ =3\times C_2H_4O=C_6H_{12}O_3 $
