If the of pure water at is 12, what is the nature of an aqueous solution at with a pH of 6.5? — Ionic Equilibrium Chemistry Question

💡 Solution & Explanation

At $90^\circ C$, $pK_w = 12$, meaning neutral pH = 6.0. Since 6.5 > 6.0, the solution has a lower $[H^+]$ than $[OH^-]$, making it basic.