solution of weak acids with higher pH

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Corryn Doll
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

solution of weak acids with higher pH

Postby Corryn Doll » Thu Jun 14, 2018 10:14 am

Why do solutions of weak acids have a higher pH value than solutions of strong acids at the same concentration?

Chem_Mod
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Re: solution of weak acids with higher pH

Postby Chem_Mod » Thu Jun 14, 2018 3:40 pm

weaker acids dissociate less, meaning H3O+ is produced less. So, [H3O+] is lower in concentration than that of stronger acid, hence pH = -log[H3O+] is higher.

ran2000
Posts: 66
Joined: Fri Sep 28, 2018 12:15 am

Re: solution of weak acids with higher pH

Postby ran2000 » Fri Nov 30, 2018 11:12 pm

Weak acids do not completely dissociate and thus the proton yield is lower. Consequently, the pH is higher than for a strong acid which almost always dissociate completely and yields higher proton concentration.

Lucy Agnew 3E
Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

Re: solution of weak acids with higher pH

Postby Lucy Agnew 3E » Sat Dec 01, 2018 9:13 am

less dissociation => less H30+ produced=> higher pH!

Letizia Ye 4F
Posts: 62
Joined: Fri Sep 28, 2018 12:28 am

Re: solution of weak acids with higher pH

Postby Letizia Ye 4F » Sat Dec 01, 2018 10:07 am

Since weak acids do not dissociate 100%, they will produce less H3O+. The concentration of H3O+ will be lower, and results in a higher pH value.


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