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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: nozo on December 22, 2007, 07:50:09 PM

Title: Stoichiometry
Post by: nozo on December 22, 2007, 07:50:09 PM

Hi guys, can someone tell me if I did the ff. setup correctly?

How many grams of water are liberated by the complete decomposition of 100g of copper (II) sulfate pentahydrate?

CuSO₄.5H₂O ----> CuSO₄ + 5H₂O

100g CuSO₄.5H₂O (1 mol CuSO₄.5H₂O / 250g CuSO₄.5H₂O) (5 mol H₂O / 1 mol CuSO₄.5H₂O) (90g H₂O / 1 mol H₂O)

Thanks!

Title: Re: Stoichiometry
Post by: agrobert on December 22, 2007, 08:01:58 PM

looks good

Title: Re: Stoichiometry
Post by: enahs on December 22, 2007, 08:02:17 PM

The method is correct. Your molecular weight for water is incorrect though.

Title: Re: Stoichiometry
Post by: nozo on December 22, 2007, 08:09:01 PM

Thanks guys   ;D

Oh and yeah, 18g for H2O... lol

Title: Re: Stoichiometry
Post by: bball927je on January 11, 2008, 12:11:12 PM

lol yeah the molecular weight for water was wayyy off