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#### Loler

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##### Pyrite oxidation homework problem
« on: January 13, 2018, 11:20:38 AM »

Determine the concentration of sulfate if 1g of pyrite oxidizes in 1L of water.

Here is my attempt at answering. Can someone let me know if i'm right please.

FeS2 + 7/2 H2O + 15/4 O2 = 2SO4 + Fe(OH)3 + 4H+

1000 mg/l pyrite = 8.33 mM (1000mg/l / 120g/mol)

1:2 ratio between FeS2 and SO4 8.33 mM*2 = 16.66mM sulfate produced

Thank you.
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#### Borek

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##### Re: Pyrite oxidation homework problem
« Reply #1 on: January 14, 2018, 01:39:36 AM »

Looks OK, but please format your reaction equations correctly, with 2 and 2- where necessary.
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