weak acid/base and pH

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bellaha4F
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Joined: Wed Sep 18, 2019 12:20 am

weak acid/base and pH

Postby bellaha4F » Sat Dec 07, 2019 10:44 pm

So in general a weak base will raise the pH and a weak acid will lower the pH, right?

Isabel Day 1D
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Joined: Fri Aug 09, 2019 12:15 am

Re: weak acid/base and pH

Postby Isabel Day 1D » Sat Dec 07, 2019 10:47 pm

Yes, because acids have pH less than 7 and bases have pH greater than 7.

505306205
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Re: weak acid/base and pH

Postby 505306205 » Sat Dec 07, 2019 11:17 pm

A weak base will not raise the pH as much as a strong base would and that also goes for weak acids as they are incompletely protonated/deprotonized.

Emilie_Paltrinieri_1K
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Joined: Wed Sep 30, 2020 10:07 pm

Re: weak acid/base and pH

Postby Emilie_Paltrinieri_1K » Sun Dec 06, 2020 2:58 pm

So in general a weak base will raise the pH and a weak acid will lower the pH, right?
Yes, remember that acidic solutions have lower pH (so on the left side of the scale), while more basic solutions have higher pH (right side of the scale).

Ryan_Kien_1L
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Re: weak acid/base and pH

Postby Ryan_Kien_1L » Sun Dec 06, 2020 3:31 pm

Yes, the same applies for strong acids/bases as well.

Veeda Khan 2E
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Re: weak acid/base and pH

Postby Veeda Khan 2E » Sun Dec 06, 2020 3:35 pm

Yes, but the stronger the acid/base, the more significant the change will be.

Libby Dillon - 1A
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Re: weak acid/base and pH

Postby Libby Dillon - 1A » Mon Dec 07, 2020 11:26 am

Yes, an acid (strong or weak) will lower the pH of a solution while a base (strong or weak) will raise the pH of a solution. Remember a pH of 7 is neutral, 0 is the most acidic, and 14 is the most basic.

isha dis3d
Posts: 66
Joined: Wed Sep 30, 2020 9:47 pm

Re: weak acid/base and pH

Postby isha dis3d » Mon Dec 07, 2020 12:15 pm

If the salt has the anion of a weak acid, it will make the solution basic. If the salt has a cation of a weak base, it will make the solution acidic.

505612629
Posts: 44
Joined: Wed Sep 30, 2020 9:43 pm

Re: weak acid/base and pH

Postby 505612629 » Sat Dec 12, 2020 10:00 pm

As those above have stated, yes. The stronger the acid(towards 0)/base(towards 14) the greater the impact.

Shruti Kulkarni 2I
Posts: 62
Joined: Thu Oct 08, 2020 12:16 am

Re: weak acid/base and pH

Postby Shruti Kulkarni 2I » Sat Dec 12, 2020 10:24 pm

Yep! This happens cuz weak acids have pH's lower than 7 and weak bases have pH's over 7, so they usually will be lowering or raising the pH.


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