Question

Which of the following mathematical expression correctly represents the Henry's law?
(Where $p$ is the partial pressure of gas over the solution, $K_H$ is Henry’s law constant and $\chi$ is mole fraction of the gas in the solution.)

• A. $p^2\times \chi =K_H$
• B. $p\times {\chi }^2=K_H$
• C. $\chi =\frac{p}{K_H}$
  
• D. None of the above

Answer 1

The correct option is C $\chi =\frac{p}{K_H}$


Henry's Law :
“The solubility of a gas in a liquid at a given temperature is directly proportional to its partial pressure of the gas present above the solution”
$p=K_H\times \chi \Rightarrow \chi =\frac{p}{K_H}$