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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: michi on November 25, 2007, 04:46:08 PM

Title: limiting reagant question
Post by: michi on November 25, 2007, 04:46:08 PM
Ok so I have to a limiting reagant problem involving Cu(Gly)n 2+ (Copper Glycine). I started with 3 grams of Copper (II) sulfate pentahydrate and 1.5 grams of glycine. I ended up with 3.26 grams of Copper Glycine. How would I go about solving this? Thanks in advance.
Title: Re: limiting reagant question
Post by: Borek on November 25, 2007, 04:57:35 PM
Most likely you should start with balanced reaction equation and molar masses of all compounds mentioned.
Title: Re: limiting reagant question
Post by: michi on November 25, 2007, 05:35:36 PM
well I know that copper (II) sulfate pentahydrate is CuSO4 and glycine is C2H5NO2 and Copper Glycine is Cu(Gly)n 2+, but I don't understand how to get from CuSO4+C2H5NO2 -->Cu(Gly)n 2+-- even with double replacement. I guess what I'm trying to say is that if I can figure out the equation, I may understand how to work out the problem.
Title: Re: limiting reagant question
Post by: Borek on November 25, 2007, 06:04:06 PM
Think net ionic. Cu2+ reacts with uncharged Gly to give Cu(Gly)n2+.
Title: Re: limiting reagant question
Post by: michi on November 25, 2007, 06:40:57 PM
oo ok- that makes so much more sense than what I was coming up with lol. I totally forgot to take that into account. Thanks!