When to add H+ or H20

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Bryce Ramirez 1J
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When to add H+ or H20

Postby Bryce Ramirez 1J » Wed Feb 26, 2020 10:50 pm

When splitting up a redox reaction into its two separate half reactions, how do you know when you would add H20 or H+ to fix the amount of hydrogens one each side of an equation?

Selena Yu 1H
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Re: When to add H+ or H20

Postby Selena Yu 1H » Wed Feb 26, 2020 10:50 pm

You add H2O to balance the amount of oxygens and you do this step first. Then you add H+ to balance the amount of hydrogens.

AniP_2D
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Re: When to add H+ or H20

Postby AniP_2D » Thu Feb 27, 2020 9:18 pm

Its also important to note that you add H+ when the solution is acidic and OH- when the solution is basic.

gabbymaraziti
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Re: When to add H+ or H20

Postby gabbymaraziti » Thu Feb 27, 2020 9:50 pm

You add H2O to balance the oxygen, and H+ to balance the hydrogen in an acidic solution.

You add OH- to balance the oxygen, and H2O to balance the hydrogen in a basic solution.

Jacob Motawakel
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Re: When to add H+ or H20

Postby Jacob Motawakel » Fri Feb 28, 2020 2:25 am

You add H20 to balance the number of oxygens in acidic/basic solutions. You add H+ to balance the number of hydrogens in an acidic solution. You add OH- to balance the number of hydrogens in a basic solution.

RRahimtoola1I
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Re: When to add H+ or H20

Postby RRahimtoola1I » Sat Feb 29, 2020 7:56 pm

This is how you balance for both:

1. determine the oxidation and reduction half reactions.
2. Balance both half reactions:
a) Balance elements other than H or O
b) Balance O elements by adding H2O molecules to match the number of O molecules you have.
c) Balance H elements by adding H+ (aq) FOR BASES: add OH- molecules to cancel all H+ molecules which will become H2O and most likely cancel with H2Os on the other side of the reaction
d) Balance the overall charge on both sides by adding electrons to the more positive side.
e) Combine both of the balanced half rxns (make sure the # of electrons in the half rxns match before you do this). Cancel any electrons or molecules that appear on both sides.

HuyHa_2H
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Re: When to add H+ or H20

Postby HuyHa_2H » Sat Feb 29, 2020 9:01 pm

For both acidic and basic solutions, you add H20 to balance the oxygens. Afterward for acidic solutions, you add H+ to balance the hydrogens; as for basic solutions, you add H20 to balance out the hydrogens but then add the same amount of OH- to the opposite side to maintain balance.

Daria MacAuslan 1H
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Re: When to add H+ or H20

Postby Daria MacAuslan 1H » Sat Feb 29, 2020 9:10 pm

If you are talking about acidic solutions (which I assume you are since you asked about H+ ions), you can just add H20 first to balance out the number of oxygens in the reaction, and then add however many H+ ions you need to balance out the hydrogens as well.

Nicholas_Gladkov_2J
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Re: When to add H+ or H20

Postby Nicholas_Gladkov_2J » Sat Feb 29, 2020 9:13 pm

Bryce Ramirez 1J wrote:When splitting up a redox reaction into its two separate half reactions, how do you know when you would add H20 or H+ to fix the amount of hydrogens one each side of an equation?


When you need an O to balance the reaction, you add an H2O.
When a H+ is needed, add an H+.
If the reaction is basic, you will add an equivalent amount of OH- to both sides.

Naneeta Desar 1K
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Re: When to add H+ or H20

Postby Naneeta Desar 1K » Sat Feb 29, 2020 9:16 pm

h2o is used to balance the amounts of oxygen whereas h+ is used to balance the hydrogens.

vanessas0123
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Re: When to add H+ or H20

Postby vanessas0123 » Sun Mar 01, 2020 12:46 am

In acidic solution: You add H2O to balance the oxygen first, and H+ to balance the hydrogen.
In basic solution: You add OH- to balance the oxygen first, and H2O to balance the hydrogen.

Yailin Romo 4G
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Re: When to add H+ or H20

Postby Yailin Romo 4G » Sun Mar 01, 2020 1:32 pm

in an acidic solution you use H20 to balance it first followed by H+ ions but in a basic solution you use H20 to balance both sides.

Jasmine W 1K
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Re: When to add H+ or H20

Postby Jasmine W 1K » Sun Mar 01, 2020 4:47 pm

In an acidic solution, you can use both H+ and H2O to balance the equation. In an acidic solution, You can add H2O to balance the oxygen first, and then H+ to balance the hydrogens. In a basic solution, you can add OH- to balance the oxygens and then add H2O to balance the hydrogens.

Abigail_Hagen2G
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Re: When to add H+ or H20

Postby Abigail_Hagen2G » Sun Mar 01, 2020 6:37 pm

It really depends if the solution is acidic, basic, or neutral

Orrin Zhong 4G
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Re: When to add H+ or H20

Postby Orrin Zhong 4G » Sun Mar 01, 2020 9:07 pm

In an acidic solution, you would balance oxygen with H2O and then balance the excess hydrogens with H+'s. In a basic solution, you would add get the acidic reaction and then add OH- on both sides to balance out the H+'s.

ShastaB4C
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Re: When to add H+ or H20

Postby ShastaB4C » Sun Mar 01, 2020 10:41 pm

Abigail_Hagen2G wrote:It really depends if the solution is acidic, basic, or neutral

How would you balance in a neutral solution? Like what steps would not use?

ShastaB4C
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Re: When to add H+ or H20

Postby ShastaB4C » Sun Mar 01, 2020 10:42 pm

Also, these videos really helped me out. He goes step by step teaching how to balance redox in non-neutral solutions.https://youtu.be/IZ1tKxsqV74

ShastaB4C
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Re: When to add H+ or H20

Postby ShastaB4C » Sun Mar 01, 2020 10:43 pm

ShastaB4C wrote:Also, these videos really helped me out. He goes step by step teaching how to balance redox in non-neutral solutions.https://youtu.be/IZ1tKxsqV74

https://youtu.be/v5sDNmYCaqo

Jacob Villar 2C
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Re: When to add H+ or H20

Postby Jacob Villar 2C » Sun Mar 01, 2020 10:45 pm

H2O should be added first, since in doing so you would contribute to balancing the hydrogens and oxygens first. Then, add H+ to balance out the rest of the hydrogens in the acidic solution.

kristi le 2F
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Re: When to add H+ or H20

Postby kristi le 2F » Mon Mar 02, 2020 12:56 am

Also, remember to use H+ and H2O to balance acidic solutions and OH- and H2O to balance basic solutions.


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