Calculating pH

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Emily Orozco L4
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Joined: Fri Sep 28, 2018 12:29 am

Calculating pH

Postby Emily Orozco L4 » Sun Dec 02, 2018 11:51 pm

How would we calculate the pH of a strong acid?
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Sydney To 1D
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Joined: Fri Sep 28, 2018 12:15 am

Re: Calculating pH

Postby Sydney To 1D » Mon Dec 03, 2018 9:16 am

If given the molarity of the strong acid solution, you would take the -log[H+] to calculate the pH. Since it is a strong acid, it completely dissociates and the molarity of the strong acid is equivalent to the concentration of H+ ions.
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kateminden
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

Re: Calculating pH

Postby kateminden » Mon Dec 03, 2018 2:52 pm

Calculating the pH of a strong acid is the same as calculating the pH of any aqueous solution. Basically, you need to know the molarity of the hydronium ion (concentration in moles per liter), and then you just use the equation pH = - log [H3O+].
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