pKa and pH

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abbydouglas1K
Posts: 65
Joined: Fri Sep 28, 2018 12:26 am

pKa and pH

Postby abbydouglas1K » Thu Jan 24, 2019 11:02 pm

Are pKa and the pH the same thing ?

Mya Majewski 1L
Posts: 89
Joined: Fri Sep 25, 2015 3:00 am

Re: pKa and pH

Postby Mya Majewski 1L » Thu Jan 24, 2019 11:09 pm

No, pka=-log Ka and pH=-log(H30+)
so the equations both involve a negative log (the "p" signals a negative log)
Basically they are related but the pH tells you the amount of H atoms in a solution and the pka is more specific in letting us know how acidic something is (the lower the pka the stronger the acid and the higher the Ka the stronger the acid)

Andre_Galenchik_2L
Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

Re: pKa and pH

Postby Andre_Galenchik_2L » Fri Jan 25, 2019 12:01 am

pH can be used to find the amount of hydronium ions in a certain reaction. pKa allows you to solve for reaction quantities by giving you the equilibrium constant of the reaction.


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