If the [H+] is 2.1 × 10–12 M HClO4, what is the pH? Is the solution ACIDIC, BASIC, or NEUTRAL?
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pH = -log [H+]
= -log [2.1 • 10^-12]
= 12 - log 2.1
= 12 - 0.32
pH = 11.68
Since the pH is greater than 7 it’s a basic solution.
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