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This question already has an answer here:

Lets say we prepare a solution of $\ce{HCl}$ with a concentration of $\mathrm{10^{-8}}$. Even on full dissociation (which it will, because it is a strong acid), the $\ce{H+}$ ion concentration due to $\ce{HCl}$ is $\mathrm{10^{-8}}$.

So shouldn't the pH be 8? Is there any factor I am missing? Does the properties of acids change at low concentrations? If so, then how?

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marked as duplicate by YAHB, orthocresol Apr 1 '17 at 18:10

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • $\begingroup$ @Mithoron I got my answer. How do you get if a question is duplicate? I search for questions and hardly get relevant answers! $\endgroup$ – YAHB Apr 1 '17 at 17:53
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    $\begingroup$ Must be my superior searching skills ;) There are some tips (chemistry.meta.stackexchange.com/questions/3071/…) but practice is needed to be good at it. $\endgroup$ – Mithoron Apr 1 '17 at 18:10
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Water is a weak acid, too. At that concentration of your acid, the number of hydronium ions from water will be roughly $10^{-7}$ molar, making the solution roughly neutral.

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