Molar concentration of H3O

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LeAirraBullingor2k
Posts: 77
Joined: Wed Mar 13, 2019 12:15 am

Molar concentration of H3O

Postby LeAirraBullingor2k » Thu Jan 23, 2020 10:44 pm

How do we calculate the molar concentration of H3O given just the Kw?

Angela Patel 2J
Posts: 110
Joined: Sat Aug 24, 2019 12:17 am

Re: Molar concentration of H3O

Postby Angela Patel 2J » Thu Jan 23, 2020 10:47 pm

You would have to know the concentration of OH- if that was the only information you are given.

Michael Nguyen 1E
Posts: 120
Joined: Sat Aug 17, 2019 12:17 am

Re: Molar concentration of H3O

Postby Michael Nguyen 1E » Thu Jan 23, 2020 11:03 pm

Depending on the information given in the question, you may have to use different equations to solve for [H3O+]. An equation that relates [H3O+] to Kw would be [H3O+][OH-]=Kw.

Tauhid Islam- 1H
Posts: 64
Joined: Fri Aug 02, 2019 12:15 am

Re: Molar concentration of H3O

Postby Tauhid Islam- 1H » Thu Jan 23, 2020 11:19 pm

If you are just given Kw, then wouldn't the molar concentration of H3O be 1.0*10^-7?

Ryan Yoon 1L
Posts: 55
Joined: Mon Jul 01, 2019 12:15 am

Re: Molar concentration of H3O

Postby Ryan Yoon 1L » Thu Jan 23, 2020 11:25 pm

How do we calculate the molar concentration of H3O given just the Kw? Assuming that you are calculating the [h3o+] of pure water and it is at 25 degrees Celcius, the concentration of H3O+ be 1.0*10^-7.

Sean Cheah 1E
Posts: 105
Joined: Wed Sep 18, 2019 12:20 am

Re: Molar concentration of H3O

Postby Sean Cheah 1E » Fri Jan 24, 2020 9:20 am

Even if the temperature is not 25C, assuming that you are dealing with pure water, [H3O+] = [OH-] so .

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: Molar concentration of H3O

Postby Ayushi2011 » Fri Jan 24, 2020 12:15 pm

If we assume that the concentrations of h3o+ and oh- is the same, the answer will be square root of kw which is 10^-7.


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