Question

In Victor Meyers experiment, $0.23$ g of a volatile solute displaced air which measures $112$ ml at NTP. Calculate the vapour density and molecular weight of the substance.

• A. $23.01$
• B. $25.07$
• C. $18.92$
• D. $21.68$

Answer 1

The correct option is A $23.01$

Volume occupied by solute at NTP = Volume of air displaced at NTP = 112 ml

For volatile solute $PV=\frac{w}{MRT}$

At NTP, $P=1atm,T=273K$

$\therefore$ $1\ast \frac{112}{1000}=\frac{0.23}{m}\ast 0.0821\ast 273$

m = 46.02 and V.D. = 23.01