What is the pH of a .025 M $HCl$ solution?

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Answer 1 · 2016-06-06T22:36:28

The pH is 1.60.

Hydrochloric acid is a strong acid that completely dissociates in water.

For a 0.025 M HCl solution the concentration of the hydrogen ions, $["H"^+]$ , is 0.025 moles/liter (i.e. 0.025 M).

pH is defined as $-log ["H"^+]$ .

Substituting 0.025 into the equation for pH we find that the 0.025 M HCl solution has a pH of -log(0.025) = 1.60.

What is the pH of a .025 M HClHCl solution?