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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: Questions_14 on September 14, 2010, 08:16:26 PM

Title: Chemical Reaction Equation
Post by: Questions_14 on September 14, 2010, 08:16:26 PM
Hi,

Just after some help in regards to the correct equation for the reaction of sulfur dioxide with ferric. I know that the SO2 reduces the Fe3+ to Fe2+ but the equation I came up with didn't look right.

Here is what I got:

SO2 + Fe3+ + H2O :rarrow: Fe2+ + H2SO4 + 2H+


Thanks in advance for any help
Title: Re: Chemical Reaction Equation
Post by: Borek on September 15, 2010, 02:56:15 AM
I guess it all happens in water, so you may probably assume you start with SO32-.
Title: Re: Chemical Reaction Equation
Post by: BluRay on September 15, 2010, 02:36:03 PM
It's not necessary, you can have sulfur dioxide in solution as it is. He only have to look at the O.N. of sulfur and Fe and to understand how many moles of Fe for every mole of SO2 he have to put. Then compute the charge and then hydrogens, adding water somwhere, and it's finished.
Title: Re: Chemical Reaction Equation
Post by: Borek on September 15, 2010, 04:10:38 PM
To some extent yes, but if you think about products assuming you end with another electrically neutral molecule in water is ridiculous. Hence I would start with sulfurous, to make my life easier ;)
Title: Re: Chemical Reaction Equation
Post by: BluRay on September 16, 2010, 04:36:13 PM
Quote from: Borek on September 15, 2010, 04:10:38 PM
To some extent yes, but if you think about products assuming you end with another electrically neutral molecule in water is ridiculous. Hence I would start with sulfurous, to make my life easier ;)
Ah, yes, at least he should have written HSO4- + H+, instead of H2SO4 + H+  :)
Title: Re: Chemical Reaction Equation
Post by: ooosh on October 02, 2010, 03:38:44 AM
SO2 + 2Fe3+ + 2H2O :rarrow:  2Fe2+  + SO42-  + 4H+