The Henry's law constant () values for , , , and in water at are , , , and respectively. Based on th — Solutions and Colligative Properties Chemistry Question
Question
The Henry's law constant ($K_H$) values for $Ar$, $CO_2$, $H_2$, and $O_2$ in water at $298\text{ K}$ are $40.3$, $1.67$, $69.16$, and $34.86\text{ kbar}$ respectively. Based on these values, which of the following statements are chemically correct?
Answer: A,B,C
💡 Solution & Explanation
From the relation $P = K_H \chi$, we can deduce $\chi = \frac{P}{K_H}$. Thus, at constant pressure, a higher $K_H$ indicates lower solubility. The given $K_H$ order is $H_2 > Ar > O_2 > CO_2$. Inverting this gives the solubility order: $CO_2 > O_2 > Ar > H_2$. Option D is incorrect because $K_H$ is inversely proportional to solubility.
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