Acidic Solutions

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Dustin Shin 2I
Posts: 64
Joined: Fri Sep 28, 2018 12:26 am

Acidic Solutions

Postby Dustin Shin 2I » Thu Feb 28, 2019 3:18 am

Is there an easier way to determine which side of the equation to add the H20 or the H when balancing a redox equation in an acidic solution that I am not aware of?

megan blatt 2B
Posts: 61
Joined: Fri Sep 28, 2018 12:28 am

Re: Acidic Solutions

Postby megan blatt 2B » Thu Feb 28, 2019 3:46 am

You first use H2O to balance the oxygens so you put the H2O on the side opposite of the molecule that includes oxygen. Then you use H+ to balance the hydrogens so you will likely put the H+ on the side opposite of the H2O. I think there might be a couple exceptions to this, but usually this is how it works.

Ethan Baurle 1A
Posts: 33
Joined: Fri Sep 28, 2018 12:19 am

Re: Acidic Solutions

Postby Ethan Baurle 1A » Thu Feb 28, 2019 7:08 am

Also, don't forget that adding hydronium ions adds electrons to that side when you are balancing the electrons later.

hanna_maillard3B
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Acidic Solutions

Postby hanna_maillard3B » Thu Feb 28, 2019 5:25 pm

When a molecule consists of an oxygen atom/s and changes (becomes product / or is reversed into reactant) into its elemental form (i.e. MnO4- becomes Mn2+), you must accommodate for the missing oxygen atom/s. Therefore, when the reaction occurs in an acidic solution, you add H2O to the side without the oxygen and add H+ to the side with the oxygen (to balance the new H atoms from the addition of water). For instance, you would add H20 to the side of the reaction with Mn2+ and H+ to the side of the reaction with MnO4-.

Ashe Chen 2C
Posts: 31
Joined: Mon Jan 07, 2019 8:23 am

Re: Acidic Solutions

Postby Ashe Chen 2C » Sun Mar 03, 2019 4:21 pm

Balance the equation first by adding H2O to the side that lacks oxygen, then add H+ ions to the other side to balance it overall.

Helen Mejia 1I
Posts: 67
Joined: Fri Sep 28, 2018 12:24 am

Re: Acidic Solutions

Postby Helen Mejia 1I » Mon Mar 04, 2019 12:13 am

For acidic solutions, you add H20 to balance the oxygens and then you add H+ to balance the hydrogens. Then you should balance the charges.

Abby-Hile-1F
Posts: 46
Joined: Fri Sep 28, 2018 12:16 am

Re: Acidic Solutions

Postby Abby-Hile-1F » Sun Mar 10, 2019 7:46 pm

H2O is used to balance oxygens, then since you added extra H with the water, you balance the H2O with H+

dgerges 4H
Posts: 65
Joined: Fri Sep 28, 2018 12:24 am

Re: Acidic Solutions

Postby dgerges 4H » Sun Mar 10, 2019 8:34 pm

what do we do when the reaction isn't acidic. add oh- instead?


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