Balancing Redox Reaction with Hydrogens

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Kelly Tran 3N
Posts: 11
Joined: Sat Jul 09, 2016 3:00 am

Balancing Redox Reaction with Hydrogens

Postby Kelly Tran 3N » Thu Feb 09, 2017 9:06 pm

Why do some redox reactions involve hydrogen protons as well? For example, in problem 14.1.b and 14.1.c, the half reactions are balanced with both hydrogen protons and electrons.

Chem_Mod
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Joined: Thu Aug 04, 2011 1:53 pm
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Re: Balancing Redox Reaction with Hydrogens

Postby Chem_Mod » Thu Feb 09, 2017 10:16 pm

When balancing redox reactions, you always use to balance out the oxygens. In acidic conditions, you would then use H+ to balance the hydrogens in the reaction.

Jordan Pace 2B
Posts: 14
Joined: Wed Sep 21, 2016 2:57 pm

Re: Balancing Redox Reaction with Hydrogens

Postby Jordan Pace 2B » Fri Feb 10, 2017 12:00 pm

My TA gave us a list of steps for how to balance redox reactions!

Step 1: Write the skeletons of the half-reactions
Step 2: Balance all elements other than H and O
Step 3: Balance O by adding H2O to the side without O
Step 4: Balance H by adding H+ to the side without H
Step 5: Balance charges by adding e- (electrons)
Step 6: Balance overall charges of both half-reactions by multiplying by a common factor
Step 7: Add the two reactions
-If acidic, stop here
-If basic, continue to step 8
Step 8: Add OH- to both sides to cancel H+ ions
Step 9: Combine OH- and H+ to form H2O
Step 10: Cancel H2O molecules and check charge balance

Hope this helps!

604735966
Posts: 22
Joined: Wed Sep 21, 2016 2:59 pm

Re: Balancing Redox Reaction with Hydrogens

Postby 604735966 » Fri Feb 10, 2017 1:24 pm

Jordan's post is extremely helpful! This should definitely be endorsed! :)


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