Question

${}^{\prime }{K}^{\prime }$ is Henry’s constant and has the unit

• A. $atmmo{l}^{-1}d{m}^3$
• B. $mo{l}^{-1}d{m}^{3}at{m}^{-1}$
• C. $atmmold{m}^{-3}$
• D. $mold{m}^{-3}at{m}^{-1}$

Answer 1

Answer: (D)

According to Henry's "the partial pressure of the gas in vapour phase $(p)$ is proportional to the mole fraction of the gas $(\chi )$ in the solution". It is expressed as

$p\propto \chi \text{ or }p=K_{H}X$

where, $K_H=$ Henry's law constant Its unit is $M\mid$ atm or $mold{m}^{-3}at{m}^{-1}$.