229428 An aqueous solution contains $0.10 \mathrm{M} \mathrm{H}_2 \mathrm{~S}$ and $0.20 M$ HCI. If the equilibrium constants for the formation of $\mathrm{HS}^{-}$from $\mathrm{H}_2 \mathrm{~S}$ is $1.0 \times 10^{-7}$ and that of $\mathrm{S}^{2-}$ from $\mathrm{HS}^{-}$ions is $1.2 \times 10^{-13}$ then the concentration of $s^{2-}$ ions in aqueous solution is
229428 An aqueous solution contains $0.10 \mathrm{M} \mathrm{H}_2 \mathrm{~S}$ and $0.20 M$ HCI. If the equilibrium constants for the formation of $\mathrm{HS}^{-}$from $\mathrm{H}_2 \mathrm{~S}$ is $1.0 \times 10^{-7}$ and that of $\mathrm{S}^{2-}$ from $\mathrm{HS}^{-}$ions is $1.2 \times 10^{-13}$ then the concentration of $s^{2-}$ ions in aqueous solution is
229428 An aqueous solution contains $0.10 \mathrm{M} \mathrm{H}_2 \mathrm{~S}$ and $0.20 M$ HCI. If the equilibrium constants for the formation of $\mathrm{HS}^{-}$from $\mathrm{H}_2 \mathrm{~S}$ is $1.0 \times 10^{-7}$ and that of $\mathrm{S}^{2-}$ from $\mathrm{HS}^{-}$ions is $1.2 \times 10^{-13}$ then the concentration of $s^{2-}$ ions in aqueous solution is
229428 An aqueous solution contains $0.10 \mathrm{M} \mathrm{H}_2 \mathrm{~S}$ and $0.20 M$ HCI. If the equilibrium constants for the formation of $\mathrm{HS}^{-}$from $\mathrm{H}_2 \mathrm{~S}$ is $1.0 \times 10^{-7}$ and that of $\mathrm{S}^{2-}$ from $\mathrm{HS}^{-}$ions is $1.2 \times 10^{-13}$ then the concentration of $s^{2-}$ ions in aqueous solution is