6A.19

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Connor Ho 1B
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Joined: Sat Aug 17, 2019 12:17 am

6A.19

Postby Connor Ho 1B » Mon Jan 13, 2020 11:35 pm

Calculate the molar concentration of OH in solutions with the following molar concentrations of H3O+:

c) 3.1 M

In the solutions manual, it says you divide 10-14 by 3.1 x 10-3 to get 3.2 x 10-12. Is this an error with the solutions manual/textbook (because the molarity of H3O+ does not match between the solutions manual/textbook), or am I missing something to calculate the OH- concentration?

Prasanna Padmanabham 4I
Posts: 111
Joined: Thu Jul 25, 2019 12:17 am

Re: 6A.19

Postby Prasanna Padmanabham 4I » Mon Jan 13, 2020 11:42 pm

that's confusing...hmm...did it say millimolars? I'm interested in an answer too...

nicolely2F
Posts: 149
Joined: Sat Sep 14, 2019 12:17 am

Re: 6A.19

Postby nicolely2F » Mon Jan 13, 2020 11:44 pm

Pretty sure the textbook question should be 3.1x10^-3 instead of just 3.1, since all the units are the same (L) and it's otherwise just plugging numbers in.

Subashni Rajiv 1K
Posts: 101
Joined: Wed Sep 18, 2019 12:16 am

Re: 6A.19

Postby Subashni Rajiv 1K » Tue Jan 14, 2020 12:09 am

Yeah, when I did this problem, I got 3.2x10^-15.

Ryan Lee 1E
Posts: 50
Joined: Sat Aug 17, 2019 12:16 am

Re: 6A.19

Postby Ryan Lee 1E » Tue Jan 14, 2020 1:33 am

I got a 10^-15 value as well. Seems the solutions manual is off.

Jessica Esparza 2H
Posts: 130
Joined: Wed Sep 18, 2019 12:15 am

Re: 6A.19

Postby Jessica Esparza 2H » Tue Jan 14, 2020 10:08 am

I was looking at this too! Either they forgot to add mM to the problem or it is an error in the solutions manual. I got the answer to the ^-15.

Donna Nguyen 2L
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: 6A.19

Postby Donna Nguyen 2L » Tue Jan 14, 2020 11:55 pm

I was having the same problem! It's probably just a mistake in the solutions manual.


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