Adding H+, OH- and H20

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Ashley McClearnen 1B
Posts: 59
Joined: Fri Sep 28, 2018 12:26 am

Adding H+, OH- and H20

Postby Ashley McClearnen 1B » Mon Feb 25, 2019 1:34 pm

Can someone please explain when to add H+, OH- or H20 when balancing redox reactions in acidic/basic solutions?

Nathaniel 2E
Posts: 27
Joined: Mon Jun 25, 2018 3:00 am

Re: Adding H+, OH- and H20

Postby Nathaniel 2E » Mon Feb 25, 2019 1:56 pm

For acidic solutions, first balance O by adding H2O, then balance H by adding H+.

For basic solutions, first balance O by adding H2O, then balance H by adding H2O to the side of each half reaction that needs H and adding OH- to the other side.

Toru Fiberesima 1L
Posts: 63
Joined: Fri Apr 06, 2018 11:02 am

Re: Adding H+, OH- and H20

Postby Toru Fiberesima 1L » Mon Feb 25, 2019 2:04 pm

H2O and H+ are used to balance out the numbers of oxygen and hydrogen atoms in the reaction, look at 14.1 in textbook for an example

Karyn Nguyen 1K
Posts: 72
Joined: Fri Apr 06, 2018 11:04 am

Re: Adding H+, OH- and H20

Postby Karyn Nguyen 1K » Mon Feb 25, 2019 11:04 pm

When do we know when to add H2O on both sides?

Christina Chang 1C
Posts: 34
Joined: Thu May 10, 2018 3:00 am

Re: Adding H+, OH- and H20

Postby Christina Chang 1C » Tue Feb 26, 2019 1:07 am

For a reaction in acidic solution, when there are unbalanced oxygens you would add H2O and then to balance out the extra hydrogens you would add H+. I'm not sure if that answered your question?


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