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Hydroxide and H+

Posted: Sun Feb 23, 2020 7:56 pm
by Helen Struble 2F
Are hydroxide and H+ available to balance redox reactions even in neutral solutions? I know that these species are found in neutral water, but in small, equal amounts. Is there enough of each species present to use them to balance half reactions?

Re: Hydroxide and H+

Posted: Sun Feb 23, 2020 9:06 pm
by 405318478
I haven't come across any questions that require you to balance using OH and H unless the problem specifically mentions an acidic/basic solution.

Re: Hydroxide and H+

Posted: Sun Feb 23, 2020 9:08 pm
by VLi_2B
In neutral solutions, you should use H2O to balance the hydrogens.

Re: Hydroxide and H+

Posted: Sun Feb 23, 2020 9:13 pm
by Justin Vayakone 1C
Well if it's a neutral solution, that should mean the redox reaction wouldn't be using or creating any H+ or OH-. If we had to balance a redox reaction in neutral solution, we would probably be given something like this where H+ or OH- ions wouldn't be needed: Cu+(aq)+Fe(s)→Fe3+(aq)+Cu(s)

Re: Hydroxide and H+

Posted: Sun Feb 23, 2020 9:16 pm
by ThomasNguyen_Dis1H
The problems should only tell you specifically whether the solution is acidic or basic. That's why you're able to add H+ or OH- freely.

Re: Hydroxide and H+

Posted: Sun Feb 23, 2020 9:40 pm
by 405268063
I believe you only use hydroxide and H+ to balance a solution only if you are told it is acidic or basic. I would agree with everyone else that you should probably use water to balance things out in a neutral solution.

Re: Hydroxide and H+

Posted: Sun Feb 23, 2020 9:51 pm
by kendal mccarthy
I think for neutral solutions mainly one should use h2o to make up the difference in redox reactions.