salt pH

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Adam Kramer 1A
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Joined: Sat Aug 24, 2019 12:15 am

salt pH

Postby Adam Kramer 1A » Sat Jan 18, 2020 11:31 pm

How do I solve for pH when a salt is dissolved? How do I know if the ion changes the pH of a solution or not?

Kaylee Sepulveda 4G
Posts: 100
Joined: Thu Jul 11, 2019 12:16 am

Re: salt pH

Postby Kaylee Sepulveda 4G » Sun Jan 19, 2020 1:28 pm

Alex Chen 2L
Posts: 86
Joined: Wed Sep 18, 2019 12:21 am

Re: salt pH

Postby Alex Chen 2L » Sun Jan 19, 2020 1:53 pm

The pH of a salt solution depends on whether the dissolved salt has an ion that is a conjugate base of a weak acid, or a conjugate acid of a weak base. You would solve for the pH in the same manner as for a weak acid or base, just that the Kb or Ka value of the ion is equal to Kw/Ka or Kw/Kb of the weak acid or weak base the ion is a conjugate for.

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