Q. Calculate the molecular weight of the given organic compound. If in Victor Meyer's method $0.2g$ of an organic substance displaced 56 mL of air at STP.
NTA AbhyasNTA Abhyas 2022
Solution:
In Victor Meyer method:
Volume of air displaced = volume of vapour produced by organic compound
STP volume of vapour of organic compound = 56 mL
$Molesoforganiccompound=\frac{given mass of organic compound}{molar mass of organic compound}Molesoforganiccompound=\frac{STP volume of vapour in mL}{22400}$
$\frac{w}{M_{w}}=\frac{V}{22400}\frac{0 . 2}{M_{w}}=\frac{56}{22400}M_{w}=\frac{22400 \times 0 . 2}{56}M_{w}=80g/mol$
Volume of air displaced = volume of vapour produced by organic compound
STP volume of vapour of organic compound = 56 mL
$Molesoforganiccompound=\frac{given mass of organic compound}{molar mass of organic compound}Molesoforganiccompound=\frac{STP volume of vapour in mL}{22400}$
$\frac{w}{M_{w}}=\frac{V}{22400}\frac{0 . 2}{M_{w}}=\frac{56}{22400}M_{w}=\frac{22400 \times 0 . 2}{56}M_{w}=80g/mol$