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
Question
If the $pK_w$ of pure water at $90^\circ C$ is 12, what is the nature of an aqueous solution at $90^\circ C$ with a pH of 6.5?
Answer: B
💡 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.
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