Hydronium Concentration

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Chase Yonamine 1J
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Joined: Fri Sep 28, 2018 12:17 am

Hydronium Concentration

Postby Chase Yonamine 1J » Thu Jan 17, 2019 8:36 pm

Why is it when [H3O+]<10^-7 the solution is considered neutral?

Theodore_Herring_1A
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

Re: Hydronium Concentration

Postby Theodore_Herring_1A » Thu Jan 17, 2019 8:39 pm

This is because when you plug in a value where [H3O+]<10^-7 into the formula for pH, you get a value greater than 7. However, this does not make sense, since acids have a pH of less than 7. Thus, we say the solution is neutral.

Anushi Patel 1J
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Re: Hydronium Concentration

Postby Anushi Patel 1J » Thu Jan 17, 2019 8:43 pm

Just to add on, there is already an [h3O+] of 10^-7 present in the water, and the total [h30+] even with the weak acid ends up being about the same as neutral water.

kimberlyrose1G
Posts: 44
Joined: Fri Sep 28, 2018 12:27 am

Re: Hydronium Concentration

Postby kimberlyrose1G » Thu Jan 17, 2019 9:01 pm

The reaction is considered neutral because both the pH and pOH are equal to 7, canceling each other out and making it a neutral reaction.


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