pH of acids

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Adrienne_4F
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

pH of acids

Postby Adrienne_4F » Sat Dec 08, 2018 7:09 pm

Why does a strong acid have a smaller pH compared to a weak acid that has a higher pH?

Sona Hakobyan 3J
Posts: 45
Joined: Fri Sep 28, 2018 12:25 am

Re: pH of acids

Postby Sona Hakobyan 3J » Sat Dec 08, 2018 7:30 pm

https://upload.wikimedia.org/wikipedia/ ... ale-01.jpg
Take a a look at this scale. The lower the PH, the more acidic it is. Thus, the stronger the acid, the lower its PH.

Sang Hyoun Hong 3G
Posts: 31
Joined: Fri Sep 28, 2018 12:27 am

Re: pH of acids

Postby Sang Hyoun Hong 3G » Sun Dec 09, 2018 9:15 am

The lower the pH the stronger the acid!

Matthew Tran 1H
Posts: 165
Joined: Fri Sep 28, 2018 12:16 am

Re: pH of acids

Postby Matthew Tran 1H » Sun Dec 09, 2018 9:21 am

You have to remember that pH is defined as -log[H3O+]. If [H3O+]=10^-5, then the pH is 5. If [H3O+]=10^-2, which is a higher concentration and therefore more acidic, then the pH is 2, which is smaller than 5.

Riley Dean 2D
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: pH of acids

Postby Riley Dean 2D » Sun Dec 09, 2018 10:16 am

if the pH is lower then the acid is stronger, I feel like its just something you kinda have to know

Grace Diaz 3F
Posts: 30
Joined: Fri Sep 28, 2018 12:24 am

Re: pH of acids

Postby Grace Diaz 3F » Sun Dec 09, 2018 7:04 pm

The Ph of a strong acid is lower than that of a weak acid, however the concentration of H+ is greater.

Andrew Bennecke
Posts: 62
Joined: Fri Sep 28, 2018 12:15 am

Re: pH of acids

Postby Andrew Bennecke » Mon Jan 21, 2019 1:37 pm

The pH is defined as the concentration of H+ ions within a solution by using the equation pH=-log[H+], so the higher the concentration of H+ ions within a solution indicates that the pH of the acid is lower and therefore stronger.

Aiden Atoori 1C
Posts: 67
Joined: Fri Sep 28, 2018 12:24 am

Re: pH of acids

Postby Aiden Atoori 1C » Mon Jan 21, 2019 4:32 pm

It's just like a trend. Lower ph equates stronger acids while higher ones are weaker.

RachelCheung1A
Posts: 30
Joined: Fri Sep 28, 2018 12:19 am

Re: pH of acids

Postby RachelCheung1A » Mon Jan 21, 2019 5:10 pm

Strong acid will have lower pH because it has a full dissociation into more H30+ than a weak acid. pH relies on the amount of H30+ ions (-logH30+) and so more H30+ ions will cause the pH to be lower since you are logging the molarity.


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