The hydrogen ion concentration of a HCl aqueous solution at 298 K () is closest to: — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

For highly dilute acids, water's autoionization is significant. $[H^+]_{total} = 10^{-8} + x$, $[OH^-] = x$. Solving $(10^{-8} + x)(x) = 10^{-14}$ gives total $[H^+] \approx 1.05 \times 10^{-7} \text{ M}$.