What does a solution with higher pH level indicate?

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What does a solution with higher pH level indicate?

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Answer 1 · 2017-02-07T16:47:54

An alkaline solution.

Explanation:

We interrogate the auto-protolysis equilibrium:

$2 H_{2} O ⇌ H O^{-} + H_{3} O^{+}$ $2H_2O rightleftharpoonsHO^(- )+ H_3O^+$

See this [old answer.](https://socratic.org/questions/how-do-you-find-poh-from-ph) In water, this equilibrium has been carefully measured, such that $K_{w} = [H_{3} O^{+}] [H O^{-}] = 10^{- 14}$ $K_w=[H_3O^+][HO^-]=10^(-14)$ at $298 K$ $298K$ .

We classify the acidity of the solution on the $p H$ $pH$ scale, where $p H = - {log}_{10} [H_{3} O^{+}]$ $pH=-log_10[H_3O^+]$ . Given the negative function, numerically higher $p H$ $pH$ values indicate that $[H O^{-}]$ $[HO^-]$ is greater than $10^{- 7}$ $10^-7$ $m o l \cdot L^{- 1}$ $mol*L^-1$ , and, necessarily, $[H_{3} O^{+}]$ $[H_3O^+]$ is LESS than $10^{- 7}$ $10^-7$ $m o l \cdot L^{- 1}$ $mol*L^-1$ .

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What does a solution with higher pH level indicate?

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