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Topic: Balancing an equation  (Read 2541 times)

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Offline Fallingman321

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Balancing an equation
« on: November 07, 2010, 05:19:37 PM »
$$ Fe^0 (s) + HCl (aq) ----> Fe^2^+ (s) /$$

Hey guys, I need some help balancing this equation... I was given the following and told to balance it, but they didn't even write any states in the problem, so I think these are the states that were being implied..

I know that iron is being oxidized, and that HCl is going to dissociate in water to H+ and Cl-...

Can anyone explain how I might approach this :)?

Thanks,
Fallingman321

Offline sinthreck

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Re: Balancing an equation
« Reply #1 on: November 08, 2010, 12:20:04 AM »
Balancing redox reactions in aqueous solutions:

Step 1) Identify and separate half-reactions
Step 2) For each half-reaction
           - Balance elements (except H and O)
           - Balance O using H2O
           - Balance H using H+
           - Balance charge using electrons.
Step 3) Equalise number of electrons in each half-reaction (i.e. multiply half reaction by a factor)
Step 4) Add half-reactions (cancel identical species)
Step 5) Check elements and charges balance

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