NCERT Solutions for Chapter: Solutions, Exercise 2: Intext Questions

${\mathrm{H}}_2\mathrm{S}$, a toxic gas with a rotten egg-like smell is used for the qualitative analysis. If the solubility of ${\mathrm{H}}_2\mathrm{S}$ in water at $\mathrm{STP}$ is $0.195 \mathrm{m}$, Calculate Henry's law constant. 

Henry's law constant for ${\mathrm{CO}}_2$ in water is $1.67\times {10}^8 \mathrm{Pa} \mathrm{at} 298 \mathrm{K}$. Calculate the quantity of ${\mathrm{CO}}_2$ in $500 \mathrm{mL}$ of soda water when packed under $2.5 \mathrm{atm}$ pressure of ${\mathrm{CO}}_2$ at $298 \mathrm{K}$.